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Finding the Fourth Proportional to 81,585.52, 122,305.80 and 28,988.08

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Solution

The fourth proportional to 81,585.52, 122,305.80 and 28,988.08 is: 43,456.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,585.52 : 122,305.80 = 28,988.08 : x
  2. Step 2: Convert to fraction form
    81,585.52/122,305.80 = 28,988.08/x
  3. Step 3: Cross multiply
    81,585.52x = 122,305.80 × 28,988.08
  4. Step 4: Simplify right side
    81,585.52x = 3,545,410,314.86
  5. Step 5: Solve for x
    x = 3,545,410,314.86/81,585.52
  6. Step 6: Final answer
    x = 43,456.37

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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.