Home / 137,115.28-189,188.36-86,785.04

Finding the Fourth Proportional to 137,115.28, 189,188.36 and 86,785.04

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Solution

The fourth proportional to 137,115.28, 189,188.36 and 86,785.04 is: 119,743.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,115.28 : 189,188.36 = 86,785.04 : x
  2. Step 2: Convert to fraction form
    137,115.28/189,188.36 = 86,785.04/x
  3. Step 3: Cross multiply
    137,115.28x = 189,188.36 × 86,785.04
  4. Step 4: Simplify right side
    137,115.28x = 16,418,719,390.13
  5. Step 5: Solve for x
    x = 16,418,719,390.13/137,115.28
  6. Step 6: Final answer
    x = 119,743.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.