Home / 56,708.28-78,257.71-31,217.20

Finding the Fourth Proportional to 56,708.28, 78,257.71 and 31,217.20

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Solution

The fourth proportional to 56,708.28, 78,257.71 and 31,217.20 is: 43,079.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,708.28 : 78,257.71 = 31,217.20 : x
  2. Step 2: Convert to fraction form
    56,708.28/78,257.71 = 31,217.20/x
  3. Step 3: Cross multiply
    56,708.28x = 78,257.71 × 31,217.20
  4. Step 4: Simplify right side
    56,708.28x = 2,442,986,721.46
  5. Step 5: Solve for x
    x = 2,442,986,721.46/56,708.28
  6. Step 6: Final answer
    x = 43,079.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.