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Finding the Fourth Proportional to 103,475.53, 155,321.88 and 91,704.61

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Solution

The fourth proportional to 103,475.53, 155,321.88 and 91,704.61 is: 137,653.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,475.53 : 155,321.88 = 91,704.61 : x
  2. Step 2: Convert to fraction form
    103,475.53/155,321.88 = 91,704.61/x
  3. Step 3: Cross multiply
    103,475.53x = 155,321.88 × 91,704.61
  4. Step 4: Simplify right side
    103,475.53x = 14,243,731,194.73
  5. Step 5: Solve for x
    x = 14,243,731,194.73/103,475.53
  6. Step 6: Final answer
    x = 137,653.14

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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.