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Finding the Fourth Proportional to 158,358.42, 218,531.92 and 85,760.72

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Solution

The fourth proportional to 158,358.42, 218,531.92 and 85,760.72 is: 118,348.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,358.42 : 218,531.92 = 85,760.72 : x
  2. Step 2: Convert to fraction form
    158,358.42/218,531.92 = 85,760.72/x
  3. Step 3: Cross multiply
    158,358.42x = 218,531.92 × 85,760.72
  4. Step 4: Simplify right side
    158,358.42x = 18,741,454,373.38
  5. Step 5: Solve for x
    x = 18,741,454,373.38/158,358.42
  6. Step 6: Final answer
    x = 118,348.33

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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.