Home / 83,639.62-125,378.79-28,205.38

Finding the Fourth Proportional to 83,639.62, 125,378.79 and 28,205.38

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Solution

The fourth proportional to 83,639.62, 125,378.79 and 28,205.38 is: 42,280.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,639.62 : 125,378.79 = 28,205.38 : x
  2. Step 2: Convert to fraction form
    83,639.62/125,378.79 = 28,205.38/x
  3. Step 3: Cross multiply
    83,639.62x = 125,378.79 × 28,205.38
  4. Step 4: Simplify right side
    83,639.62x = 3,536,356,415.89
  5. Step 5: Solve for x
    x = 3,536,356,415.89/83,639.62
  6. Step 6: Final answer
    x = 42,280.88

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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.