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Finding the Fourth Proportional to 48,979.80, 73,469.70 and 31,469.40

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Solution

The fourth proportional to 48,979.80, 73,469.70 and 31,469.40 is: 47,204.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,979.80 : 73,469.70 = 31,469.40 : x
  2. Step 2: Convert to fraction form
    48,979.80/73,469.70 = 31,469.40/x
  3. Step 3: Cross multiply
    48,979.80x = 73,469.70 × 31,469.40
  4. Step 4: Simplify right side
    48,979.80x = 2,312,047,377.18
  5. Step 5: Solve for x
    x = 2,312,047,377.18/48,979.80
  6. Step 6: Final answer
    x = 47,204.10

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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.