Home / 100,818.30-139,121.10-58,379.52

Finding the Fourth Proportional to 100,818.30, 139,121.10 and 58,379.52

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Solution

The fourth proportional to 100,818.30, 139,121.10 and 58,379.52 is: 80,559.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,818.30 : 139,121.10 = 58,379.52 : x
  2. Step 2: Convert to fraction form
    100,818.30/139,121.10 = 58,379.52/x
  3. Step 3: Cross multiply
    100,818.30x = 139,121.10 × 58,379.52
  4. Step 4: Simplify right side
    100,818.30x = 8,121,823,039.87
  5. Step 5: Solve for x
    x = 8,121,823,039.87/100,818.30
  6. Step 6: Final answer
    x = 80,559.02

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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.