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Finding the Fourth Proportional to 91,571.40, 137,381.40 and 32,400.90

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Solution

The fourth proportional to 91,571.40, 137,381.40 and 32,400.90 is: 48,609.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,571.40 : 137,381.40 = 32,400.90 : x
  2. Step 2: Convert to fraction form
    91,571.40/137,381.40 = 32,400.90/x
  3. Step 3: Cross multiply
    91,571.40x = 137,381.40 × 32,400.90
  4. Step 4: Simplify right side
    91,571.40x = 4,451,281,003.26
  5. Step 5: Solve for x
    x = 4,451,281,003.26/91,571.40
  6. Step 6: Final answer
    x = 48,609.95

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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.