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Finding the Fourth Proportional to 57,356.70, 85,864.95 and 42,630.90

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Solution

The fourth proportional to 57,356.70, 85,864.95 and 42,630.90 is: 63,819.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,356.70 : 85,864.95 = 42,630.90 : x
  2. Step 2: Convert to fraction form
    57,356.70/85,864.95 = 42,630.90/x
  3. Step 3: Cross multiply
    57,356.70x = 85,864.95 × 42,630.90
  4. Step 4: Simplify right side
    57,356.70x = 3,660,500,096.96
  5. Step 5: Solve for x
    x = 3,660,500,096.96/57,356.70
  6. Step 6: Final answer
    x = 63,819.92

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1.5x scale

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.