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Finding the Fourth Proportional to 71,951.20, 99,288.88 and 40,119.44

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Solution

The fourth proportional to 71,951.20, 99,288.88 and 40,119.44 is: 55,362.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,951.20 : 99,288.88 = 40,119.44 : x
  2. Step 2: Convert to fraction form
    71,951.20/99,288.88 = 40,119.44/x
  3. Step 3: Cross multiply
    71,951.20x = 99,288.88 × 40,119.44
  4. Step 4: Simplify right side
    71,951.20x = 3,983,414,263.83
  5. Step 5: Solve for x
    x = 3,983,414,263.83/71,951.20
  6. Step 6: Final answer
    x = 55,362.72

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1.5x scale

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.