Home / 158,986.20-219,402.15-86,389.78

Finding the Fourth Proportional to 158,986.20, 219,402.15 and 86,389.78

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Solution

The fourth proportional to 158,986.20, 219,402.15 and 86,389.78 is: 119,218.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,986.20 : 219,402.15 = 86,389.78 : x
  2. Step 2: Convert to fraction form
    158,986.20/219,402.15 = 86,389.78/x
  3. Step 3: Cross multiply
    158,986.20x = 219,402.15 × 86,389.78
  4. Step 4: Simplify right side
    158,986.20x = 18,954,103,470.03
  5. Step 5: Solve for x
    x = 18,954,103,470.03/158,986.20
  6. Step 6: Final answer
    x = 119,218.55

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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.