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Finding the Fourth Proportional to 158,488.58, 218,712.94 and 86,868.44

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Solution

The fourth proportional to 158,488.58, 218,712.94 and 86,868.44 is: 119,877.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,488.58 : 218,712.94 = 86,868.44 : x
  2. Step 2: Convert to fraction form
    158,488.58/218,712.94 = 86,868.44/x
  3. Step 3: Cross multiply
    158,488.58x = 218,712.94 × 86,868.44
  4. Step 4: Simplify right side
    158,488.58x = 18,999,251,905.61
  5. Step 5: Solve for x
    x = 18,999,251,905.61/158,488.58
  6. Step 6: Final answer
    x = 119,877.73

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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.