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Finding the Fourth Proportional to 92,708.20, 139,062.30 and 89,079.40

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Solution

The fourth proportional to 92,708.20, 139,062.30 and 89,079.40 is: 133,619.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,708.20 : 139,062.30 = 89,079.40 : x
  2. Step 2: Convert to fraction form
    92,708.20/139,062.30 = 89,079.40/x
  3. Step 3: Cross multiply
    92,708.20x = 139,062.30 × 89,079.40
  4. Step 4: Simplify right side
    92,708.20x = 12,387,586,246.62
  5. Step 5: Solve for x
    x = 12,387,586,246.62/92,708.20
  6. Step 6: Final answer
    x = 133,619.10

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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.