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Finding the Fourth Proportional to 157,601.40, 217,491.60 and 85,981.20

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Solution

The fourth proportional to 157,601.40, 217,491.60 and 85,981.20 is: 118,654.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,601.40 : 217,491.60 = 85,981.20 : x
  2. Step 2: Convert to fraction form
    157,601.40/217,491.60 = 85,981.20/x
  3. Step 3: Cross multiply
    157,601.40x = 217,491.60 × 85,981.20
  4. Step 4: Simplify right side
    157,601.40x = 18,700,188,757.92
  5. Step 5: Solve for x
    x = 18,700,188,757.92/157,601.40
  6. Step 6: Final answer
    x = 118,654.97

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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.