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Finding the Fourth Proportional to 66,468.80, 99,589.80 and 31,336.40

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Solution

The fourth proportional to 66,468.80, 99,589.80 and 31,336.40 is: 46,951.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,468.80 : 99,589.80 = 31,336.40 : x
  2. Step 2: Convert to fraction form
    66,468.80/99,589.80 = 31,336.40/x
  3. Step 3: Cross multiply
    66,468.80x = 99,589.80 × 31,336.40
  4. Step 4: Simplify right side
    66,468.80x = 3,120,785,808.72
  5. Step 5: Solve for x
    x = 3,120,785,808.72/66,468.80
  6. Step 6: Final answer
    x = 46,951.14

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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.