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Finding the Fourth Proportional to 158,490.96, 218,723.13 and 86,870.97

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Solution

The fourth proportional to 158,490.96, 218,723.13 and 86,870.97 is: 119,885.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,490.96 : 218,723.13 = 86,870.97 : x
  2. Step 2: Convert to fraction form
    158,490.96/218,723.13 = 86,870.97/x
  3. Step 3: Cross multiply
    158,490.96x = 218,723.13 × 86,870.97
  4. Step 4: Simplify right side
    158,490.96x = 19,000,690,464.54
  5. Step 5: Solve for x
    x = 19,000,690,464.54/158,490.96
  6. Step 6: Final answer
    x = 119,885.01

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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.