Home / 80,790.78-121,123.73-40,789.18

Finding the Fourth Proportional to 80,790.78, 121,123.73 and 40,789.18

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Solution

The fourth proportional to 80,790.78, 121,123.73 and 40,789.18 is: 61,152.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,790.78 : 121,123.73 = 40,789.18 : x
  2. Step 2: Convert to fraction form
    80,790.78/121,123.73 = 40,789.18/x
  3. Step 3: Cross multiply
    80,790.78x = 121,123.73 × 40,789.18
  4. Step 4: Simplify right side
    80,790.78x = 4,940,537,625.24
  5. Step 5: Solve for x
    x = 4,940,537,625.24/80,790.78
  6. Step 6: Final answer
    x = 61,152.25

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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.