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Finding the Fourth Proportional to 72,553.97, 100,123.08 and 40,286.91

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Solution

The fourth proportional to 72,553.97, 100,123.08 and 40,286.91 is: 55,595.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,553.97 : 100,123.08 = 40,286.91 : x
  2. Step 2: Convert to fraction form
    72,553.97/100,123.08 = 40,286.91/x
  3. Step 3: Cross multiply
    72,553.97x = 100,123.08 × 40,286.91
  4. Step 4: Simplify right side
    72,553.97x = 4,033,649,613.60
  5. Step 5: Solve for x
    x = 4,033,649,613.60/72,553.97
  6. Step 6: Final answer
    x = 55,595.16

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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.