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Finding the Fourth Proportional to 123,551.70, 185,327.55 and 81,488.40

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Solution

The fourth proportional to 123,551.70, 185,327.55 and 81,488.40 is: 122,232.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,551.70 : 185,327.55 = 81,488.40 : x
  2. Step 2: Convert to fraction form
    123,551.70/185,327.55 = 81,488.40/x
  3. Step 3: Cross multiply
    123,551.70x = 185,327.55 × 81,488.40
  4. Step 4: Simplify right side
    123,551.70x = 15,102,045,525.42
  5. Step 5: Solve for x
    x = 15,102,045,525.42/123,551.70
  6. Step 6: Final answer
    x = 122,232.60

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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.