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Finding the Fourth Proportional to 115,007.20, 172,518.90 and 65,111.20

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Solution

The fourth proportional to 115,007.20, 172,518.90 and 65,111.20 is: 97,671.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,007.20 : 172,518.90 = 65,111.20 : x
  2. Step 2: Convert to fraction form
    115,007.20/172,518.90 = 65,111.20/x
  3. Step 3: Cross multiply
    115,007.20x = 172,518.90 × 65,111.20
  4. Step 4: Simplify right side
    115,007.20x = 11,232,912,601.68
  5. Step 5: Solve for x
    x = 11,232,912,601.68/115,007.20
  6. Step 6: Final answer
    x = 97,671.39

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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.