Home / 81,979.62-122,982.36-28,686.48

Finding the Fourth Proportional to 81,979.62, 122,982.36 and 28,686.48

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Solution

The fourth proportional to 81,979.62, 122,982.36 and 28,686.48 is: 43,034.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,979.62 : 122,982.36 = 28,686.48 : x
  2. Step 2: Convert to fraction form
    81,979.62/122,982.36 = 28,686.48/x
  3. Step 3: Cross multiply
    81,979.62x = 122,982.36 × 28,686.48
  4. Step 4: Simplify right side
    81,979.62x = 3,527,931,010.49
  5. Step 5: Solve for x
    x = 3,527,931,010.49/81,979.62
  6. Step 6: Final answer
    x = 43,034.24

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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.