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Finding the Fourth Proportional to 125,655.30, 188,515.76 and 65,687.76

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Solution

The fourth proportional to 125,655.30, 188,515.76 and 65,687.76 is: 98,548.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,655.30 : 188,515.76 = 65,687.76 : x
  2. Step 2: Convert to fraction form
    125,655.30/188,515.76 = 65,687.76/x
  3. Step 3: Cross multiply
    125,655.30x = 188,515.76 × 65,687.76
  4. Step 4: Simplify right side
    125,655.30x = 12,383,177,670.66
  5. Step 5: Solve for x
    x = 12,383,177,670.66/125,655.30
  6. Step 6: Final answer
    x = 98,548.79

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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.