Home / 165,205.30-247,613.55-86,278.90

Finding the Fourth Proportional to 165,205.30, 247,613.55 and 86,278.90

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Solution

The fourth proportional to 165,205.30, 247,613.55 and 86,278.90 is: 129,316.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,205.30 : 247,613.55 = 86,278.90 : x
  2. Step 2: Convert to fraction form
    165,205.30/247,613.55 = 86,278.90/x
  3. Step 3: Cross multiply
    165,205.30x = 247,613.55 × 86,278.90
  4. Step 4: Simplify right side
    165,205.30x = 21,363,824,719.10
  5. Step 5: Solve for x
    x = 21,363,824,719.10/165,205.30
  6. Step 6: Final answer
    x = 129,316.82

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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.