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Finding the Fourth Proportional to 103,672.06, 155,505.21 and 72,527.74

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Solution

The fourth proportional to 103,672.06, 155,505.21 and 72,527.74 is: 108,789.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,672.06 : 155,505.21 = 72,527.74 : x
  2. Step 2: Convert to fraction form
    103,672.06/155,505.21 = 72,527.74/x
  3. Step 3: Cross multiply
    103,672.06x = 155,505.21 × 72,527.74
  4. Step 4: Simplify right side
    103,672.06x = 11,278,441,439.53
  5. Step 5: Solve for x
    x = 11,278,441,439.53/103,672.06
  6. Step 6: Final answer
    x = 108,789.60

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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.