Home / 115,420.20-173,130.30-77,998.20

Finding the Fourth Proportional to 115,420.20, 173,130.30 and 77,998.20

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Solution

The fourth proportional to 115,420.20, 173,130.30 and 77,998.20 is: 116,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,420.20 : 173,130.30 = 77,998.20 : x
  2. Step 2: Convert to fraction form
    115,420.20/173,130.30 = 77,998.20/x
  3. Step 3: Cross multiply
    115,420.20x = 173,130.30 × 77,998.20
  4. Step 4: Simplify right side
    115,420.20x = 13,503,851,765.46
  5. Step 5: Solve for x
    x = 13,503,851,765.46/115,420.20
  6. Step 6: Final answer
    x = 116,997.30

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.