Home / 78,331.20-117,496.80-19,166.10

Finding the Fourth Proportional to 78,331.20, 117,496.80 and 19,166.10

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Solution

The fourth proportional to 78,331.20, 117,496.80 and 19,166.10 is: 28,749.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,331.20 : 117,496.80 = 19,166.10 : x
  2. Step 2: Convert to fraction form
    78,331.20/117,496.80 = 19,166.10/x
  3. Step 3: Cross multiply
    78,331.20x = 117,496.80 × 19,166.10
  4. Step 4: Simplify right side
    78,331.20x = 2,251,955,418.48
  5. Step 5: Solve for x
    x = 2,251,955,418.48/78,331.20
  6. Step 6: Final answer
    x = 28,749.15

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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.