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Finding the Fourth Proportional to 91,817.70, 137,718.45 and 25,251.90

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Solution

The fourth proportional to 91,817.70, 137,718.45 and 25,251.90 is: 37,875.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,817.70 : 137,718.45 = 25,251.90 : x
  2. Step 2: Convert to fraction form
    91,817.70/137,718.45 = 25,251.90/x
  3. Step 3: Cross multiply
    91,817.70x = 137,718.45 × 25,251.90
  4. Step 4: Simplify right side
    91,817.70x = 3,477,652,527.56
  5. Step 5: Solve for x
    x = 3,477,652,527.56/91,817.70
  6. Step 6: Final answer
    x = 37,875.62

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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.