Home / 137,139.18-189,257.25-76,709.64

Finding the Fourth Proportional to 137,139.18, 189,257.25 and 76,709.64

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Solution

The fourth proportional to 137,139.18, 189,257.25 and 76,709.64 is: 105,862.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,139.18 : 189,257.25 = 76,709.64 : x
  2. Step 2: Convert to fraction form
    137,139.18/189,257.25 = 76,709.64/x
  3. Step 3: Cross multiply
    137,139.18x = 189,257.25 × 76,709.64
  4. Step 4: Simplify right side
    137,139.18x = 14,517,855,514.89
  5. Step 5: Solve for x
    x = 14,517,855,514.89/137,139.18
  6. Step 6: Final answer
    x = 105,862.20

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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.