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Finding the Fourth Proportional to 158,394.33, 218,574.99 and 86,761.89

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Solution

The fourth proportional to 158,394.33, 218,574.99 and 86,761.89 is: 119,726.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,394.33 : 218,574.99 = 86,761.89 : x
  2. Step 2: Convert to fraction form
    158,394.33/218,574.99 = 86,761.89/x
  3. Step 3: Cross multiply
    158,394.33x = 218,574.99 × 86,761.89
  4. Step 4: Simplify right side
    158,394.33x = 18,963,979,239.13
  5. Step 5: Solve for x
    x = 18,963,979,239.13/158,394.33
  6. Step 6: Final answer
    x = 119,726.38

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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.