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Finding the Fourth Proportional to 57,356.20, 85,864.20 and 42,630.40

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Solution

The fourth proportional to 57,356.20, 85,864.20 and 42,630.40 is: 63,819.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,356.20 : 85,864.20 = 42,630.40 : x
  2. Step 2: Convert to fraction form
    57,356.20/85,864.20 = 42,630.40/x
  3. Step 3: Cross multiply
    57,356.20x = 85,864.20 × 42,630.40
  4. Step 4: Simplify right side
    57,356.20x = 3,660,425,191.68
  5. Step 5: Solve for x
    x = 3,660,425,191.68/57,356.20
  6. Step 6: Final answer
    x = 63,819.17

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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.