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Finding the Fourth Proportional to 285,844.80, 428,628.72 and 86,127.96

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Solution

The fourth proportional to 285,844.80, 428,628.72 and 86,127.96 is: 129,150.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,844.80 : 428,628.72 = 86,127.96 : x
  2. Step 2: Convert to fraction form
    285,844.80/428,628.72 = 86,127.96/x
  3. Step 3: Cross multiply
    285,844.80x = 428,628.72 × 86,127.96
  4. Step 4: Simplify right side
    285,844.80x = 36,916,917,251.01
  5. Step 5: Solve for x
    x = 36,916,917,251.01/285,844.80
  6. Step 6: Final answer
    x = 129,150.21

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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.