Home / 128,786.76-193,179.18-40,040.10

Finding the Fourth Proportional to 128,786.76, 193,179.18 and 40,040.10

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Solution

The fourth proportional to 128,786.76, 193,179.18 and 40,040.10 is: 60,059.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,786.76 : 193,179.18 = 40,040.10 : x
  2. Step 2: Convert to fraction form
    128,786.76/193,179.18 = 40,040.10/x
  3. Step 3: Cross multiply
    128,786.76x = 193,179.18 × 40,040.10
  4. Step 4: Simplify right side
    128,786.76x = 7,734,913,685.12
  5. Step 5: Solve for x
    x = 7,734,913,685.12/128,786.76
  6. Step 6: Final answer
    x = 60,059.85

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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.