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Finding the Fourth Proportional to 103,527.20, 155,290.80 and 91,061.30

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Solution

The fourth proportional to 103,527.20, 155,290.80 and 91,061.30 is: 136,591.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,527.20 : 155,290.80 = 91,061.30 : x
  2. Step 2: Convert to fraction form
    103,527.20/155,290.80 = 91,061.30/x
  3. Step 3: Cross multiply
    103,527.20x = 155,290.80 × 91,061.30
  4. Step 4: Simplify right side
    103,527.20x = 14,140,982,126.04
  5. Step 5: Solve for x
    x = 14,140,982,126.04/103,527.20
  6. Step 6: Final answer
    x = 136,591.95

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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.