Home / 128,914.40-193,517.40-69,719.60

Finding the Fourth Proportional to 128,914.40, 193,517.40 and 69,719.60

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Solution

The fourth proportional to 128,914.40, 193,517.40 and 69,719.60 is: 104,658.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,914.40 : 193,517.40 = 69,719.60 : x
  2. Step 2: Convert to fraction form
    128,914.40/193,517.40 = 69,719.60/x
  3. Step 3: Cross multiply
    128,914.40x = 193,517.40 × 69,719.60
  4. Step 4: Simplify right side
    128,914.40x = 13,491,955,721.04
  5. Step 5: Solve for x
    x = 13,491,955,721.04/128,914.40
  6. Step 6: Final answer
    x = 104,658.25

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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.