Home / 71,520.28-98,699.06-39,691.24

Finding the Fourth Proportional to 71,520.28, 98,699.06 and 39,691.24

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Solution

The fourth proportional to 71,520.28, 98,699.06 and 39,691.24 is: 54,774.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,520.28 : 98,699.06 = 39,691.24 : x
  2. Step 2: Convert to fraction form
    71,520.28/98,699.06 = 39,691.24/x
  3. Step 3: Cross multiply
    71,520.28x = 98,699.06 × 39,691.24
  4. Step 4: Simplify right side
    71,520.28x = 3,917,488,078.23
  5. Step 5: Solve for x
    x = 3,917,488,078.23/71,520.28
  6. Step 6: Final answer
    x = 54,774.51

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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.