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Finding the Fourth Proportional to 72,296.42, 99,770.28 and 39,593.71

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Solution

The fourth proportional to 72,296.42, 99,770.28 and 39,593.71 is: 54,639.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,296.42 : 99,770.28 = 39,593.71 : x
  2. Step 2: Convert to fraction form
    72,296.42/99,770.28 = 39,593.71/x
  3. Step 3: Cross multiply
    72,296.42x = 99,770.28 × 39,593.71
  4. Step 4: Simplify right side
    72,296.42x = 3,950,275,731.89
  5. Step 5: Solve for x
    x = 3,950,275,731.89/72,296.42
  6. Step 6: Final answer
    x = 54,639.99

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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.