Home / 85,721.98-128,613.22-38,332.66

Finding the Fourth Proportional to 85,721.98, 128,613.22 and 38,332.66

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Solution

The fourth proportional to 85,721.98, 128,613.22 and 38,332.66 is: 57,512.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,721.98 : 128,613.22 = 38,332.66 : x
  2. Step 2: Convert to fraction form
    85,721.98/128,613.22 = 38,332.66/x
  3. Step 3: Cross multiply
    85,721.98x = 128,613.22 × 38,332.66
  4. Step 4: Simplify right side
    85,721.98x = 4,930,086,833.77
  5. Step 5: Solve for x
    x = 4,930,086,833.77/85,721.98
  6. Step 6: Final answer
    x = 57,512.52

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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.