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Finding the Fourth Proportional to 88,914.20, 133,079.70 and 69,085.40

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Solution

The fourth proportional to 88,914.20, 133,079.70 and 69,085.40 is: 103,401.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,914.20 : 133,079.70 = 69,085.40 : x
  2. Step 2: Convert to fraction form
    88,914.20/133,079.70 = 69,085.40/x
  3. Step 3: Cross multiply
    88,914.20x = 133,079.70 × 69,085.40
  4. Step 4: Simplify right side
    88,914.20x = 9,193,864,306.38
  5. Step 5: Solve for x
    x = 9,193,864,306.38/88,914.20
  6. Step 6: Final answer
    x = 103,401.53

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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.