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Finding the Fourth Proportional to 82,785.40, 124,229.40 and 43,370.80

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Solution

The fourth proportional to 82,785.40, 124,229.40 and 43,370.80 is: 65,083.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,785.40 : 124,229.40 = 43,370.80 : x
  2. Step 2: Convert to fraction form
    82,785.40/124,229.40 = 43,370.80/x
  3. Step 3: Cross multiply
    82,785.40x = 124,229.40 × 43,370.80
  4. Step 4: Simplify right side
    82,785.40x = 5,387,928,461.52
  5. Step 5: Solve for x
    x = 5,387,928,461.52/82,785.40
  6. Step 6: Final answer
    x = 65,083.08

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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.