Home / 54,689.20-81,815.10-47,374.90

Finding the Fourth Proportional to 54,689.20, 81,815.10 and 47,374.90

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Solution

The fourth proportional to 54,689.20, 81,815.10 and 47,374.90 is: 70,872.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,689.20 : 81,815.10 = 47,374.90 : x
  2. Step 2: Convert to fraction form
    54,689.20/81,815.10 = 47,374.90/x
  3. Step 3: Cross multiply
    54,689.20x = 81,815.10 × 47,374.90
  4. Step 4: Simplify right side
    54,689.20x = 3,875,982,180.99
  5. Step 5: Solve for x
    x = 3,875,982,180.99/54,689.20
  6. Step 6: Final answer
    x = 70,872.90

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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.