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Finding the Fourth Proportional to 123,700.80, 185,405.40 and 92,499.60

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Solution

The fourth proportional to 123,700.80, 185,405.40 and 92,499.60 is: 138,640.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,700.80 : 185,405.40 = 92,499.60 : x
  2. Step 2: Convert to fraction form
    123,700.80/185,405.40 = 92,499.60/x
  3. Step 3: Cross multiply
    123,700.80x = 185,405.40 × 92,499.60
  4. Step 4: Simplify right side
    123,700.80x = 17,149,925,337.84
  5. Step 5: Solve for x
    x = 17,149,925,337.84/123,700.80
  6. Step 6: Final answer
    x = 138,640.38

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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.