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Finding the Fourth Proportional to 158,291.91, 218,442.81 and 86,671.92

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Solution

The fourth proportional to 158,291.91, 218,442.81 and 86,671.92 is: 119,607.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,291.91 : 218,442.81 = 86,671.92 : x
  2. Step 2: Convert to fraction form
    158,291.91/218,442.81 = 86,671.92/x
  3. Step 3: Cross multiply
    158,291.91x = 218,442.81 × 86,671.92
  4. Step 4: Simplify right side
    158,291.91x = 18,932,857,752.90
  5. Step 5: Solve for x
    x = 18,932,857,752.90/158,291.91
  6. Step 6: Final answer
    x = 119,607.24

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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.