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Finding the Fourth Proportional to 48,511.80, 72,621.90 and 28,780.20

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Solution

The fourth proportional to 48,511.80, 72,621.90 and 28,780.20 is: 43,083.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,511.80 : 72,621.90 = 28,780.20 : x
  2. Step 2: Convert to fraction form
    48,511.80/72,621.90 = 28,780.20/x
  3. Step 3: Cross multiply
    48,511.80x = 72,621.90 × 28,780.20
  4. Step 4: Simplify right side
    48,511.80x = 2,090,072,806.38
  5. Step 5: Solve for x
    x = 2,090,072,806.38/48,511.80
  6. Step 6: Final answer
    x = 43,083.80

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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.