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Finding the Fourth Proportional to 158,339.82, 218,507.31 and 86,719.26

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Solution

The fourth proportional to 158,339.82, 218,507.31 and 86,719.26 is: 119,671.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,339.82 : 218,507.31 = 86,719.26 : x
  2. Step 2: Convert to fraction form
    158,339.82/218,507.31 = 86,719.26/x
  3. Step 3: Cross multiply
    158,339.82x = 218,507.31 × 86,719.26
  4. Step 4: Simplify right side
    158,339.82x = 18,948,792,227.79
  5. Step 5: Solve for x
    x = 18,948,792,227.79/158,339.82
  6. Step 6: Final answer
    x = 119,671.68

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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.