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Finding the Fourth Proportional to 72,159.78, 99,516.02 and 45,304.80

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Solution

The fourth proportional to 72,159.78, 99,516.02 and 45,304.80 is: 62,480.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,159.78 : 99,516.02 = 45,304.80 : x
  2. Step 2: Convert to fraction form
    72,159.78/99,516.02 = 45,304.80/x
  3. Step 3: Cross multiply
    72,159.78x = 99,516.02 × 45,304.80
  4. Step 4: Simplify right side
    72,159.78x = 4,508,553,382.90
  5. Step 5: Solve for x
    x = 4,508,553,382.90/72,159.78
  6. Step 6: Final answer
    x = 62,480.14

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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.