Home / 138,668.22-208,132.34-72,155.48

Finding the Fourth Proportional to 138,668.22, 208,132.34 and 72,155.48

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Solution

The fourth proportional to 138,668.22, 208,132.34 and 72,155.48 is: 108,300.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,668.22 : 208,132.34 = 72,155.48 : x
  2. Step 2: Convert to fraction form
    138,668.22/208,132.34 = 72,155.48/x
  3. Step 3: Cross multiply
    138,668.22x = 208,132.34 × 72,155.48
  4. Step 4: Simplify right side
    138,668.22x = 15,017,887,494.78
  5. Step 5: Solve for x
    x = 15,017,887,494.78/138,668.22
  6. Step 6: Final answer
    x = 108,300.86

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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.