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Finding the Fourth Proportional to 66,271.20, 99,439.20 and 50,470.80

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Solution

The fourth proportional to 66,271.20, 99,439.20 and 50,470.80 is: 75,730.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,271.20 : 99,439.20 = 50,470.80 : x
  2. Step 2: Convert to fraction form
    66,271.20/99,439.20 = 50,470.80/x
  3. Step 3: Cross multiply
    66,271.20x = 99,439.20 × 50,470.80
  4. Step 4: Simplify right side
    66,271.20x = 5,018,775,975.36
  5. Step 5: Solve for x
    x = 5,018,775,975.36/66,271.20
  6. Step 6: Final answer
    x = 75,730.88

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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.