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Finding the Fourth Proportional to 54,468.80, 81,703.20 and 43,315.10

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Solution

The fourth proportional to 54,468.80, 81,703.20 and 43,315.10 is: 64,972.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,468.80 : 81,703.20 = 43,315.10 : x
  2. Step 2: Convert to fraction form
    54,468.80/81,703.20 = 43,315.10/x
  3. Step 3: Cross multiply
    54,468.80x = 81,703.20 × 43,315.10
  4. Step 4: Simplify right side
    54,468.80x = 3,538,982,278.32
  5. Step 5: Solve for x
    x = 3,538,982,278.32/54,468.80
  6. Step 6: Final answer
    x = 64,972.65

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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.