Home / 129,140.64-193,716.36-40,395.78

Finding the Fourth Proportional to 129,140.64, 193,716.36 and 40,395.78

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Solution

The fourth proportional to 129,140.64, 193,716.36 and 40,395.78 is: 60,595.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,140.64 : 193,716.36 = 40,395.78 : x
  2. Step 2: Convert to fraction form
    129,140.64/193,716.36 = 40,395.78/x
  3. Step 3: Cross multiply
    129,140.64x = 193,716.36 × 40,395.78
  4. Step 4: Simplify right side
    129,140.64x = 7,825,323,460.96
  5. Step 5: Solve for x
    x = 7,825,323,460.96/129,140.64
  6. Step 6: Final answer
    x = 60,595.36

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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.