Home / 71,512.56-98,686.62-39,680.64

Finding the Fourth Proportional to 71,512.56, 98,686.62 and 39,680.64

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Solution

The fourth proportional to 71,512.56, 98,686.62 and 39,680.64 is: 54,758.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,512.56 : 98,686.62 = 39,680.64 : x
  2. Step 2: Convert to fraction form
    71,512.56/98,686.62 = 39,680.64/x
  3. Step 3: Cross multiply
    71,512.56x = 98,686.62 × 39,680.64
  4. Step 4: Simplify right side
    71,512.56x = 3,915,948,241.04
  5. Step 5: Solve for x
    x = 3,915,948,241.04/71,512.56
  6. Step 6: Final answer
    x = 54,758.89

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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.