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Finding the Fourth Proportional to 123,967.80, 185,951.70 and 76,728.60

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Solution

The fourth proportional to 123,967.80, 185,951.70 and 76,728.60 is: 115,092.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,967.80 : 185,951.70 = 76,728.60 : x
  2. Step 2: Convert to fraction form
    123,967.80/185,951.70 = 76,728.60/x
  3. Step 3: Cross multiply
    123,967.80x = 185,951.70 × 76,728.60
  4. Step 4: Simplify right side
    123,967.80x = 14,267,813,608.62
  5. Step 5: Solve for x
    x = 14,267,813,608.62/123,967.80
  6. Step 6: Final answer
    x = 115,092.90

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1.5x scale

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.