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Finding the Fourth Proportional to 92,139.40, 138,209.10 and 29,816.20

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Solution

The fourth proportional to 92,139.40, 138,209.10 and 29,816.20 is: 44,724.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,139.40 : 138,209.10 = 29,816.20 : x
  2. Step 2: Convert to fraction form
    92,139.40/138,209.10 = 29,816.20/x
  3. Step 3: Cross multiply
    92,139.40x = 138,209.10 × 29,816.20
  4. Step 4: Simplify right side
    92,139.40x = 4,120,870,167.42
  5. Step 5: Solve for x
    x = 4,120,870,167.42/92,139.40
  6. Step 6: Final answer
    x = 44,724.30

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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.