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Finding the Fourth Proportional to 158,291.92, 218,442.80 and 86,671.92

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Solution

The fourth proportional to 158,291.92, 218,442.80 and 86,671.92 is: 119,607.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,291.92 : 218,442.80 = 86,671.92 : x
  2. Step 2: Convert to fraction form
    158,291.92/218,442.80 = 86,671.92/x
  3. Step 3: Cross multiply
    158,291.92x = 218,442.80 × 86,671.92
  4. Step 4: Simplify right side
    158,291.92x = 18,932,856,886.18
  5. Step 5: Solve for x
    x = 18,932,856,886.18/158,291.92
  6. Step 6: Final answer
    x = 119,607.22

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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.