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Finding the Fourth Proportional to 66,474, 99,583.20 and 52,359.48

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Solution

The fourth proportional to 66,474, 99,583.20 and 52,359.48 is: 78,438.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,474 : 99,583.20 = 52,359.48 : x
  2. Step 2: Convert to fraction form
    66,474/99,583.20 = 52,359.48/x
  3. Step 3: Cross multiply
    66,474x = 99,583.20 × 52,359.48
  4. Step 4: Simplify right side
    66,474x = 5,214,124,568.74
  5. Step 5: Solve for x
    x = 5,214,124,568.74/66,474
  6. Step 6: Final answer
    x = 78,438.56

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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.