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Finding the Fourth Proportional to 91,912.60, 137,901.30 and 88,672.60

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Solution

The fourth proportional to 91,912.60, 137,901.30 and 88,672.60 is: 133,040.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,912.60 : 137,901.30 = 88,672.60 : x
  2. Step 2: Convert to fraction form
    91,912.60/137,901.30 = 88,672.60/x
  3. Step 3: Cross multiply
    91,912.60x = 137,901.30 × 88,672.60
  4. Step 4: Simplify right side
    91,912.60x = 12,228,066,814.38
  5. Step 5: Solve for x
    x = 12,228,066,814.38/91,912.60
  6. Step 6: Final answer
    x = 133,040.16

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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.