Home / 128,716.29-193,065.12-43,327.71

Finding the Fourth Proportional to 128,716.29, 193,065.12 and 43,327.71

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Solution

The fourth proportional to 128,716.29, 193,065.12 and 43,327.71 is: 64,988.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,716.29 : 193,065.12 = 43,327.71 : x
  2. Step 2: Convert to fraction form
    128,716.29/193,065.12 = 43,327.71/x
  3. Step 3: Cross multiply
    128,716.29x = 193,065.12 × 43,327.71
  4. Step 4: Simplify right side
    128,716.29x = 8,365,069,530.48
  5. Step 5: Solve for x
    x = 8,365,069,530.48/128,716.29
  6. Step 6: Final answer
    x = 64,988.43

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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.