Home / 252,217.12-378,412.08-86,121.76

Finding the Fourth Proportional to 252,217.12, 378,412.08 and 86,121.76

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Solution

The fourth proportional to 252,217.12, 378,412.08 and 86,121.76 is: 129,212.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,217.12 : 378,412.08 = 86,121.76 : x
  2. Step 2: Convert to fraction form
    252,217.12/378,412.08 = 86,121.76/x
  3. Step 3: Cross multiply
    252,217.12x = 378,412.08 × 86,121.76
  4. Step 4: Simplify right side
    252,217.12x = 32,589,514,334.86
  5. Step 5: Solve for x
    x = 32,589,514,334.86/252,217.12
  6. Step 6: Final answer
    x = 129,212.14

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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.