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Finding the Fourth Proportional to 91,839.40, 137,499.90 and 89,247.40

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Solution

The fourth proportional to 91,839.40, 137,499.90 and 89,247.40 is: 133,619.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,839.40 : 137,499.90 = 89,247.40 : x
  2. Step 2: Convert to fraction form
    91,839.40/137,499.90 = 89,247.40/x
  3. Step 3: Cross multiply
    91,839.40x = 137,499.90 × 89,247.40
  4. Step 4: Simplify right side
    91,839.40x = 12,271,508,575.26
  5. Step 5: Solve for x
    x = 12,271,508,575.26/91,839.40
  6. Step 6: Final answer
    x = 133,619.22

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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.