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Finding the Fourth Proportional to 48,611.70, 72,874.35 and 31,979.70

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Solution

The fourth proportional to 48,611.70, 72,874.35 and 31,979.70 is: 47,941.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,611.70 : 72,874.35 = 31,979.70 : x
  2. Step 2: Convert to fraction form
    48,611.70/72,874.35 = 31,979.70/x
  3. Step 3: Cross multiply
    48,611.70x = 72,874.35 × 31,979.70
  4. Step 4: Simplify right side
    48,611.70x = 2,330,499,850.70
  5. Step 5: Solve for x
    x = 2,330,499,850.70/48,611.70
  6. Step 6: Final answer
    x = 47,941.13

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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.