Home / 137,120.78-189,226.13-76,691.18

Finding the Fourth Proportional to 137,120.78, 189,226.13 and 76,691.18

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Solution

The fourth proportional to 137,120.78, 189,226.13 and 76,691.18 is: 105,833.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,120.78 : 189,226.13 = 76,691.18 : x
  2. Step 2: Convert to fraction form
    137,120.78/189,226.13 = 76,691.18/x
  3. Step 3: Cross multiply
    137,120.78x = 189,226.13 × 76,691.18
  4. Step 4: Simplify right side
    137,120.78x = 14,511,975,196.53
  5. Step 5: Solve for x
    x = 14,511,975,196.53/137,120.78
  6. Step 6: Final answer
    x = 105,833.52

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1.5x scale

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.