Home / 112,431.26-154,891.68-78,377.87

Finding the Fourth Proportional to 112,431.26, 154,891.68 and 78,377.87

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Solution

The fourth proportional to 112,431.26, 154,891.68 and 78,377.87 is: 107,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,431.26 : 154,891.68 = 78,377.87 : x
  2. Step 2: Convert to fraction form
    112,431.26/154,891.68 = 78,377.87/x
  3. Step 3: Cross multiply
    112,431.26x = 154,891.68 × 78,377.87
  4. Step 4: Simplify right side
    112,431.26x = 12,140,079,959.12
  5. Step 5: Solve for x
    x = 12,140,079,959.12/112,431.26
  6. Step 6: Final answer
    x = 107,977.80

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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.