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Finding the Fourth Proportional to 101,438.52, 152,157.78 and 79,218.60

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Solution

The fourth proportional to 101,438.52, 152,157.78 and 79,218.60 is: 118,827.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,438.52 : 152,157.78 = 79,218.60 : x
  2. Step 2: Convert to fraction form
    101,438.52/152,157.78 = 79,218.60/x
  3. Step 3: Cross multiply
    101,438.52x = 152,157.78 × 79,218.60
  4. Step 4: Simplify right side
    101,438.52x = 12,053,726,310.71
  5. Step 5: Solve for x
    x = 12,053,726,310.71/101,438.52
  6. Step 6: Final answer
    x = 118,827.90

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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.