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Finding the Fourth Proportional to 71,565.82, 98,765.34 and 39,735.28

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Solution

The fourth proportional to 71,565.82, 98,765.34 and 39,735.28 is: 54,837.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,565.82 : 98,765.34 = 39,735.28 : x
  2. Step 2: Convert to fraction form
    71,565.82/98,765.34 = 39,735.28/x
  3. Step 3: Cross multiply
    71,565.82x = 98,765.34 × 39,735.28
  4. Step 4: Simplify right side
    71,565.82x = 3,924,468,439.20
  5. Step 5: Solve for x
    x = 3,924,468,439.20/71,565.82
  6. Step 6: Final answer
    x = 54,837.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.