Home / 81,939.30-122,947.22-42,474.89

Finding the Fourth Proportional to 81,939.30, 122,947.22 and 42,474.89

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Solution

The fourth proportional to 81,939.30, 122,947.22 and 42,474.89 is: 63,732.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,939.30 : 122,947.22 = 42,474.89 : x
  2. Step 2: Convert to fraction form
    81,939.30/122,947.22 = 42,474.89/x
  3. Step 3: Cross multiply
    81,939.30x = 122,947.22 × 42,474.89
  4. Step 4: Simplify right side
    81,939.30x = 5,222,168,818.20
  5. Step 5: Solve for x
    x = 5,222,168,818.20/81,939.30
  6. Step 6: Final answer
    x = 63,732.16

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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.