Home / 140,545.15-210,479.94-80,391.28

Finding the Fourth Proportional to 140,545.15, 210,479.94 and 80,391.28

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Solution

The fourth proportional to 140,545.15, 210,479.94 and 80,391.28 is: 120,393.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,545.15 : 210,479.94 = 80,391.28 : x
  2. Step 2: Convert to fraction form
    140,545.15/210,479.94 = 80,391.28/x
  3. Step 3: Cross multiply
    140,545.15x = 210,479.94 × 80,391.28
  4. Step 4: Simplify right side
    140,545.15x = 16,920,751,790.92
  5. Step 5: Solve for x
    x = 16,920,751,790.92/140,545.15
  6. Step 6: Final answer
    x = 120,393.71

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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.