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Finding the Fourth Proportional to 158,019.71, 218,065.70 and 86,398.97

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Solution

The fourth proportional to 158,019.71, 218,065.70 and 86,398.97 is: 119,229.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,019.71 : 218,065.70 = 86,398.97 : x
  2. Step 2: Convert to fraction form
    158,019.71/218,065.70 = 86,398.97/x
  3. Step 3: Cross multiply
    158,019.71x = 218,065.70 × 86,398.97
  4. Step 4: Simplify right side
    158,019.71x = 18,840,650,998.00
  5. Step 5: Solve for x
    x = 18,840,650,998.00/158,019.71
  6. Step 6: Final answer
    x = 119,229.76

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1.5x scale

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.