Home / 138,545.54-191,194.96-78,119.14

Finding the Fourth Proportional to 138,545.54, 191,194.96 and 78,119.14

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Solution

The fourth proportional to 138,545.54, 191,194.96 and 78,119.14 is: 107,805.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,545.54 : 191,194.96 = 78,119.14 : x
  2. Step 2: Convert to fraction form
    138,545.54/191,194.96 = 78,119.14/x
  3. Step 3: Cross multiply
    138,545.54x = 191,194.96 × 78,119.14
  4. Step 4: Simplify right side
    138,545.54x = 14,935,985,847.53
  5. Step 5: Solve for x
    x = 14,935,985,847.53/138,545.54
  6. Step 6: Final answer
    x = 107,805.61

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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.