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Finding the Fourth Proportional to 158,490.49, 218,739.30 and 98,080.61

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Solution

The fourth proportional to 158,490.49, 218,739.30 and 98,080.61 is: 135,365.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,490.49 : 218,739.30 = 98,080.61 : x
  2. Step 2: Convert to fraction form
    158,490.49/218,739.30 = 98,080.61/x
  3. Step 3: Cross multiply
    158,490.49x = 218,739.30 × 98,080.61
  4. Step 4: Simplify right side
    158,490.49x = 21,454,083,974.97
  5. Step 5: Solve for x
    x = 21,454,083,974.97/158,490.49
  6. Step 6: Final answer
    x = 135,365.12

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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.