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Finding the Fourth Proportional to 48,641.85, 72,919.71 and 19,080.90

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Solution

The fourth proportional to 48,641.85, 72,919.71 and 19,080.90 is: 28,604.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,641.85 : 72,919.71 = 19,080.90 : x
  2. Step 2: Convert to fraction form
    48,641.85/72,919.71 = 19,080.90/x
  3. Step 3: Cross multiply
    48,641.85x = 72,919.71 × 19,080.90
  4. Step 4: Simplify right side
    48,641.85x = 1,391,373,694.54
  5. Step 5: Solve for x
    x = 1,391,373,694.54/48,641.85
  6. Step 6: Final answer
    x = 28,604.46

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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.