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Finding the Fourth Proportional to 71,692.22, 98,930.13 and 39,429.11

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Solution

The fourth proportional to 71,692.22, 98,930.13 and 39,429.11 is: 54,409.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,692.22 : 98,930.13 = 39,429.11 : x
  2. Step 2: Convert to fraction form
    71,692.22/98,930.13 = 39,429.11/x
  3. Step 3: Cross multiply
    71,692.22x = 98,930.13 × 39,429.11
  4. Step 4: Simplify right side
    71,692.22x = 3,900,726,978.08
  5. Step 5: Solve for x
    x = 3,900,726,978.08/71,692.22
  6. Step 6: Final answer
    x = 54,409.35

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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.