Home / 129,686.40-178,977.60-73,103.04

Finding the Fourth Proportional to 129,686.40, 178,977.60 and 73,103.04

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Solution

The fourth proportional to 129,686.40, 178,977.60 and 73,103.04 is: 100,888.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,686.40 : 178,977.60 = 73,103.04 : x
  2. Step 2: Convert to fraction form
    129,686.40/178,977.60 = 73,103.04/x
  3. Step 3: Cross multiply
    129,686.40x = 178,977.60 × 73,103.04
  4. Step 4: Simplify right side
    129,686.40x = 13,083,806,651.90
  5. Step 5: Solve for x
    x = 13,083,806,651.90/129,686.40
  6. Step 6: Final answer
    x = 100,888.04

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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.