Home / 82,979.74-124,470-20,650.24

Finding the Fourth Proportional to 82,979.74, 124,470 and 20,650.24

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Solution

The fourth proportional to 82,979.74, 124,470 and 20,650.24 is: 30,975.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,979.74 : 124,470 = 20,650.24 : x
  2. Step 2: Convert to fraction form
    82,979.74/124,470 = 20,650.24/x
  3. Step 3: Cross multiply
    82,979.74x = 124,470 × 20,650.24
  4. Step 4: Simplify right side
    82,979.74x = 2,570,335,372.80
  5. Step 5: Solve for x
    x = 2,570,335,372.80/82,979.74
  6. Step 6: Final answer
    x = 30,975.46

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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.