Home / 115,942.90-173,871.15-80,778.10

Finding the Fourth Proportional to 115,942.90, 173,871.15 and 80,778.10

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Solution

The fourth proportional to 115,942.90, 173,871.15 and 80,778.10 is: 121,137.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,942.90 : 173,871.15 = 80,778.10 : x
  2. Step 2: Convert to fraction form
    115,942.90/173,871.15 = 80,778.10/x
  3. Step 3: Cross multiply
    115,942.90x = 173,871.15 × 80,778.10
  4. Step 4: Simplify right side
    115,942.90x = 14,044,981,141.82
  5. Step 5: Solve for x
    x = 14,044,981,141.82/115,942.90
  6. Step 6: Final answer
    x = 121,137.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.