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Finding the Fourth Proportional to 127,974, 176,604.28 and 71,388.96

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Solution

The fourth proportional to 127,974, 176,604.28 and 71,388.96 is: 98,516.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,974 : 176,604.28 = 71,388.96 : x
  2. Step 2: Convert to fraction form
    127,974/176,604.28 = 71,388.96/x
  3. Step 3: Cross multiply
    127,974x = 176,604.28 × 71,388.96
  4. Step 4: Simplify right side
    127,974x = 12,607,595,880.75
  5. Step 5: Solve for x
    x = 12,607,595,880.75/127,974
  6. Step 6: Final answer
    x = 98,516.85

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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.