Home / 66,440.20-99,610.70-40,139.40

Finding the Fourth Proportional to 66,440.20, 99,610.70 and 40,139.40

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Solution

The fourth proportional to 66,440.20, 99,610.70 and 40,139.40 is: 60,179.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,440.20 : 99,610.70 = 40,139.40 : x
  2. Step 2: Convert to fraction form
    66,440.20/99,610.70 = 40,139.40/x
  3. Step 3: Cross multiply
    66,440.20x = 99,610.70 × 40,139.40
  4. Step 4: Simplify right side
    66,440.20x = 3,998,313,731.58
  5. Step 5: Solve for x
    x = 3,998,313,731.58/66,440.20
  6. Step 6: Final answer
    x = 60,179.13

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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.