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Finding the Fourth Proportional to 158,510.72, 218,747.46 and 85,915.92

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Solution

The fourth proportional to 158,510.72, 218,747.46 and 85,915.92 is: 118,565.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,510.72 : 218,747.46 = 85,915.92 : x
  2. Step 2: Convert to fraction form
    158,510.72/218,747.46 = 85,915.92/x
  3. Step 3: Cross multiply
    158,510.72x = 218,747.46 × 85,915.92
  4. Step 4: Simplify right side
    158,510.72x = 18,793,888,328.73
  5. Step 5: Solve for x
    x = 18,793,888,328.73/158,510.72
  6. Step 6: Final answer
    x = 118,565.41

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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.