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Finding the Fourth Proportional to 72,149.90, 99,502.39 and 45,294.91

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Solution

The fourth proportional to 72,149.90, 99,502.39 and 45,294.91 is: 62,466.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,149.90 : 99,502.39 = 45,294.91 : x
  2. Step 2: Convert to fraction form
    72,149.90/99,502.39 = 45,294.91/x
  3. Step 3: Cross multiply
    72,149.90x = 99,502.39 × 45,294.91
  4. Step 4: Simplify right side
    72,149.90x = 4,506,951,799.83
  5. Step 5: Solve for x
    x = 4,506,951,799.83/72,149.90
  6. Step 6: Final answer
    x = 62,466.50

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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.