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Finding the Fourth Proportional to 48,639.80, 72,959.70 and 47,983.70

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Solution

The fourth proportional to 48,639.80, 72,959.70 and 47,983.70 is: 71,975.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,639.80 : 72,959.70 = 47,983.70 : x
  2. Step 2: Convert to fraction form
    48,639.80/72,959.70 = 47,983.70/x
  3. Step 3: Cross multiply
    48,639.80x = 72,959.70 × 47,983.70
  4. Step 4: Simplify right side
    48,639.80x = 3,500,876,356.89
  5. Step 5: Solve for x
    x = 3,500,876,356.89/48,639.80
  6. Step 6: Final answer
    x = 71,975.55

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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.