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Finding the Fourth Proportional to 179,138.76, 268,815.21 and 66,897.81

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Solution

The fourth proportional to 179,138.76, 268,815.21 and 66,897.81 is: 100,386.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    179,138.76 : 268,815.21 = 66,897.81 : x
  2. Step 2: Convert to fraction form
    179,138.76/268,815.21 = 66,897.81/x
  3. Step 3: Cross multiply
    179,138.76x = 268,815.21 × 66,897.81
  4. Step 4: Simplify right side
    179,138.76x = 17,983,148,843.69
  5. Step 5: Solve for x
    x = 17,983,148,843.69/179,138.76
  6. Step 6: Final answer
    x = 100,386.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.