Home / 90,981.60-136,534.92-31,817.40

Finding the Fourth Proportional to 90,981.60, 136,534.92 and 31,817.40

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Solution

The fourth proportional to 90,981.60, 136,534.92 and 31,817.40 is: 47,747.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,981.60 : 136,534.92 = 31,817.40 : x
  2. Step 2: Convert to fraction form
    90,981.60/136,534.92 = 31,817.40/x
  3. Step 3: Cross multiply
    90,981.60x = 136,534.92 × 31,817.40
  4. Step 4: Simplify right side
    90,981.60x = 4,344,186,163.61
  5. Step 5: Solve for x
    x = 4,344,186,163.61/90,981.60
  6. Step 6: Final answer
    x = 47,747.96

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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.