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Finding the Fourth Proportional to 150,658.56, 207,915.12 and 90,217.44

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Solution

The fourth proportional to 150,658.56, 207,915.12 and 90,217.44 is: 124,503.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,658.56 : 207,915.12 = 90,217.44 : x
  2. Step 2: Convert to fraction form
    150,658.56/207,915.12 = 90,217.44/x
  3. Step 3: Cross multiply
    150,658.56x = 207,915.12 × 90,217.44
  4. Step 4: Simplify right side
    150,658.56x = 18,757,569,863.69
  5. Step 5: Solve for x
    x = 18,757,569,863.69/150,658.56
  6. Step 6: Final answer
    x = 124,503.84

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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.