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Finding the Fourth Proportional to 128,554.92, 192,500.10 and 88,696.80

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Solution

The fourth proportional to 128,554.92, 192,500.10 and 88,696.80 is: 132,815.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,554.92 : 192,500.10 = 88,696.80 : x
  2. Step 2: Convert to fraction form
    128,554.92/192,500.10 = 88,696.80/x
  3. Step 3: Cross multiply
    128,554.92x = 192,500.10 × 88,696.80
  4. Step 4: Simplify right side
    128,554.92x = 17,074,142,869.68
  5. Step 5: Solve for x
    x = 17,074,142,869.68/128,554.92
  6. Step 6: Final answer
    x = 132,815.94

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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.