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Finding the Fourth Proportional to 57,647.28, 79,553.28 and 31,151.28

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Solution

The fourth proportional to 57,647.28, 79,553.28 and 31,151.28 is: 42,988.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,647.28 : 79,553.28 = 31,151.28 : x
  2. Step 2: Convert to fraction form
    57,647.28/79,553.28 = 31,151.28/x
  3. Step 3: Cross multiply
    57,647.28x = 79,553.28 × 31,151.28
  4. Step 4: Simplify right side
    57,647.28x = 2,478,186,500.20
  5. Step 5: Solve for x
    x = 2,478,186,500.20/57,647.28
  6. Step 6: Final answer
    x = 42,988.78

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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.