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Finding the Fourth Proportional to 89,863.80, 134,946.08 and 86,287.92

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Solution

The fourth proportional to 89,863.80, 134,946.08 and 86,287.92 is: 129,576.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,863.80 : 134,946.08 = 86,287.92 : x
  2. Step 2: Convert to fraction form
    89,863.80/134,946.08 = 86,287.92/x
  3. Step 3: Cross multiply
    89,863.80x = 134,946.08 × 86,287.92
  4. Step 4: Simplify right side
    89,863.80x = 11,644,216,555.35
  5. Step 5: Solve for x
    x = 11,644,216,555.35/89,863.80
  6. Step 6: Final answer
    x = 129,576.28

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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.