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Finding the Fourth Proportional to 102,640.60, 153,960.90 and 88,643.80

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Solution

The fourth proportional to 102,640.60, 153,960.90 and 88,643.80 is: 132,965.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,640.60 : 153,960.90 = 88,643.80 : x
  2. Step 2: Convert to fraction form
    102,640.60/153,960.90 = 88,643.80/x
  3. Step 3: Cross multiply
    102,640.60x = 153,960.90 × 88,643.80
  4. Step 4: Simplify right side
    102,640.60x = 13,647,679,227.42
  5. Step 5: Solve for x
    x = 13,647,679,227.42/102,640.60
  6. Step 6: Final answer
    x = 132,965.70

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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.