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Finding the Fourth Proportional to 92,281.20, 138,130.20 and 72,452.40

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Solution

The fourth proportional to 92,281.20, 138,130.20 and 72,452.40 is: 108,449.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,281.20 : 138,130.20 = 72,452.40 : x
  2. Step 2: Convert to fraction form
    92,281.20/138,130.20 = 72,452.40/x
  3. Step 3: Cross multiply
    92,281.20x = 138,130.20 × 72,452.40
  4. Step 4: Simplify right side
    92,281.20x = 10,007,864,502.48
  5. Step 5: Solve for x
    x = 10,007,864,502.48/92,281.20
  6. Step 6: Final answer
    x = 108,449.66

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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.