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Finding the Fourth Proportional to 57,892.20, 86,838.30 and 28,367.70

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Solution

The fourth proportional to 57,892.20, 86,838.30 and 28,367.70 is: 42,551.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,892.20 : 86,838.30 = 28,367.70 : x
  2. Step 2: Convert to fraction form
    57,892.20/86,838.30 = 28,367.70/x
  3. Step 3: Cross multiply
    57,892.20x = 86,838.30 × 28,367.70
  4. Step 4: Simplify right side
    57,892.20x = 2,463,402,842.91
  5. Step 5: Solve for x
    x = 2,463,402,842.91/57,892.20
  6. Step 6: Final answer
    x = 42,551.55

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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.