Home / 92,981.20-128,375.84-71,432.57

Finding the Fourth Proportional to 92,981.20, 128,375.84 and 71,432.57

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Solution

The fourth proportional to 92,981.20, 128,375.84 and 71,432.57 is: 98,624.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,981.20 : 128,375.84 = 71,432.57 : x
  2. Step 2: Convert to fraction form
    92,981.20/128,375.84 = 71,432.57/x
  3. Step 3: Cross multiply
    92,981.20x = 128,375.84 × 71,432.57
  4. Step 4: Simplify right side
    92,981.20x = 9,170,215,713.81
  5. Step 5: Solve for x
    x = 9,170,215,713.81/92,981.20
  6. Step 6: Final answer
    x = 98,624.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.