Home / 112,790.75-155,651.13-61,806.78

Finding the Fourth Proportional to 112,790.75, 155,651.13 and 61,806.78

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Solution

The fourth proportional to 112,790.75, 155,651.13 and 61,806.78 is: 85,293.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,790.75 : 155,651.13 = 61,806.78 : x
  2. Step 2: Convert to fraction form
    112,790.75/155,651.13 = 61,806.78/x
  3. Step 3: Cross multiply
    112,790.75x = 155,651.13 × 61,806.78
  4. Step 4: Simplify right side
    112,790.75x = 9,620,295,148.66
  5. Step 5: Solve for x
    x = 9,620,295,148.66/112,790.75
  6. Step 6: Final answer
    x = 85,293.30

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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.