Home / 129,639.24-178,913.88-75,942.72

Finding the Fourth Proportional to 129,639.24, 178,913.88 and 75,942.72

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Solution

The fourth proportional to 129,639.24, 178,913.88 and 75,942.72 is: 104,807.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,639.24 : 178,913.88 = 75,942.72 : x
  2. Step 2: Convert to fraction form
    129,639.24/178,913.88 = 75,942.72/x
  3. Step 3: Cross multiply
    129,639.24x = 178,913.88 × 75,942.72
  4. Step 4: Simplify right side
    129,639.24x = 13,587,206,692.95
  5. Step 5: Solve for x
    x = 13,587,206,692.95/129,639.24
  6. Step 6: Final answer
    x = 104,807.82

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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.