Home / 151,988.20-209,743.91-87,456.15

Finding the Fourth Proportional to 151,988.20, 209,743.91 and 87,456.15

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Solution

The fourth proportional to 151,988.20, 209,743.91 and 87,456.15 is: 120,689.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,988.20 : 209,743.91 = 87,456.15 : x
  2. Step 2: Convert to fraction form
    151,988.20/209,743.91 = 87,456.15/x
  3. Step 3: Cross multiply
    151,988.20x = 209,743.91 × 87,456.15
  4. Step 4: Simplify right side
    151,988.20x = 18,343,394,854.55
  5. Step 5: Solve for x
    x = 18,343,394,854.55/151,988.20
  6. Step 6: Final answer
    x = 120,689.60

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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.