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Finding the Fourth Proportional to 66,441.20, 99,612.20 and 40,140.40

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Solution

The fourth proportional to 66,441.20, 99,612.20 and 40,140.40 is: 60,180.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,441.20 : 99,612.20 = 40,140.40 : x
  2. Step 2: Convert to fraction form
    66,441.20/99,612.20 = 40,140.40/x
  3. Step 3: Cross multiply
    66,441.20x = 99,612.20 × 40,140.40
  4. Step 4: Simplify right side
    66,441.20x = 3,998,473,552.88
  5. Step 5: Solve for x
    x = 3,998,473,552.88/66,441.20
  6. Step 6: Final answer
    x = 60,180.63

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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.