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Finding the Fourth Proportional to 57,699.20, 86,635.20 and 40,246.40

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Solution

The fourth proportional to 57,699.20, 86,635.20 and 40,246.40 is: 60,429.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,699.20 : 86,635.20 = 40,246.40 : x
  2. Step 2: Convert to fraction form
    57,699.20/86,635.20 = 40,246.40/x
  3. Step 3: Cross multiply
    57,699.20x = 86,635.20 × 40,246.40
  4. Step 4: Simplify right side
    57,699.20x = 3,486,754,913.28
  5. Step 5: Solve for x
    x = 3,486,754,913.28/57,699.20
  6. Step 6: Final answer
    x = 60,429.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.