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Finding the Fourth Proportional to 57,126.80, 85,787.40 and 42,352.40

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Solution

The fourth proportional to 57,126.80, 85,787.40 and 42,352.40 is: 63,600.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,126.80 : 85,787.40 = 42,352.40 : x
  2. Step 2: Convert to fraction form
    57,126.80/85,787.40 = 42,352.40/x
  3. Step 3: Cross multiply
    57,126.80x = 85,787.40 × 42,352.40
  4. Step 4: Simplify right side
    57,126.80x = 3,633,302,279.76
  5. Step 5: Solve for x
    x = 3,633,302,279.76/57,126.80
  6. Step 6: Final answer
    x = 63,600.66

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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.