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Finding the Fourth Proportional to 57,281.97, 79,042.71 and 31,787.49

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Solution

The fourth proportional to 57,281.97, 79,042.71 and 31,787.49 is: 43,863.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,281.97 : 79,042.71 = 31,787.49 : x
  2. Step 2: Convert to fraction form
    57,281.97/79,042.71 = 31,787.49/x
  3. Step 3: Cross multiply
    57,281.97x = 79,042.71 × 31,787.49
  4. Step 4: Simplify right side
    57,281.97x = 2,512,569,353.70
  5. Step 5: Solve for x
    x = 2,512,569,353.70/57,281.97
  6. Step 6: Final answer
    x = 43,863.18

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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.