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Finding the Fourth Proportional to 72,149.91, 99,569.00 and 40,318.88

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Solution

The fourth proportional to 72,149.91, 99,569.00 and 40,318.88 is: 55,641.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,149.91 : 99,569.00 = 40,318.88 : x
  2. Step 2: Convert to fraction form
    72,149.91/99,569.00 = 40,318.88/x
  3. Step 3: Cross multiply
    72,149.91x = 99,569.00 × 40,318.88
  4. Step 4: Simplify right side
    72,149.91x = 4,014,510,498.95
  5. Step 5: Solve for x
    x = 4,014,510,498.95/72,149.91
  6. Step 6: Final answer
    x = 55,641.24

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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.