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Finding the Fourth Proportional to 66,641.72, 99,912.66 and 40,340.12

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Solution

The fourth proportional to 66,641.72, 99,912.66 and 40,340.12 is: 60,479.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,641.72 : 99,912.66 = 40,340.12 : x
  2. Step 2: Convert to fraction form
    66,641.72/99,912.66 = 40,340.12/x
  3. Step 3: Cross multiply
    66,641.72x = 99,912.66 × 40,340.12
  4. Step 4: Simplify right side
    66,641.72x = 4,030,488,693.92
  5. Step 5: Solve for x
    x = 4,030,488,693.92/66,641.72
  6. Step 6: Final answer
    x = 60,479.96

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1.5x scale

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.