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Finding the Fourth Proportional to 117,912.20, 176,868.30 and 80,587.40

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Solution

The fourth proportional to 117,912.20, 176,868.30 and 80,587.40 is: 120,881.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,912.20 : 176,868.30 = 80,587.40 : x
  2. Step 2: Convert to fraction form
    117,912.20/176,868.30 = 80,587.40/x
  3. Step 3: Cross multiply
    117,912.20x = 176,868.30 × 80,587.40
  4. Step 4: Simplify right side
    117,912.20x = 14,253,356,439.42
  5. Step 5: Solve for x
    x = 14,253,356,439.42/117,912.20
  6. Step 6: Final answer
    x = 120,881.10

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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.