Home / 158,543.28-218,789.66-86,921.78

Finding the Fourth Proportional to 158,543.28, 218,789.66 and 86,921.78

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Solution

The fourth proportional to 158,543.28, 218,789.66 and 86,921.78 is: 119,952.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,543.28 : 218,789.66 = 86,921.78 : x
  2. Step 2: Convert to fraction form
    158,543.28/218,789.66 = 86,921.78/x
  3. Step 3: Cross multiply
    158,543.28x = 218,789.66 × 86,921.78
  4. Step 4: Simplify right side
    158,543.28x = 19,017,585,816.15
  5. Step 5: Solve for x
    x = 19,017,585,816.15/158,543.28
  6. Step 6: Final answer
    x = 119,952.01

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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.