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Finding the Fourth Proportional to 123,396.56, 185,320.80 and 112,986.44

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Solution

The fourth proportional to 123,396.56, 185,320.80 and 112,986.44 is: 169,686.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,396.56 : 185,320.80 = 112,986.44 : x
  2. Step 2: Convert to fraction form
    123,396.56/185,320.80 = 112,986.44/x
  3. Step 3: Cross multiply
    123,396.56x = 185,320.80 × 112,986.44
  4. Step 4: Simplify right side
    123,396.56x = 20,938,737,449.95
  5. Step 5: Solve for x
    x = 20,938,737,449.95/123,396.56
  6. Step 6: Final answer
    x = 169,686.56

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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.