Home / 137,587.28-189,789.89-86,519.21

Finding the Fourth Proportional to 137,587.28, 189,789.89 and 86,519.21

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Solution

The fourth proportional to 137,587.28, 189,789.89 and 86,519.21 is: 119,345.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,587.28 : 189,789.89 = 86,519.21 : x
  2. Step 2: Convert to fraction form
    137,587.28/189,789.89 = 86,519.21/x
  3. Step 3: Cross multiply
    137,587.28x = 189,789.89 × 86,519.21
  4. Step 4: Simplify right side
    137,587.28x = 16,420,469,967.24
  5. Step 5: Solve for x
    x = 16,420,469,967.24/137,587.28
  6. Step 6: Final answer
    x = 119,345.85

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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.