Home / 54,439.12-81,651.36-21,155.98

Finding the Fourth Proportional to 54,439.12, 81,651.36 and 21,155.98

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Solution

The fourth proportional to 54,439.12, 81,651.36 and 21,155.98 is: 31,731.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,439.12 : 81,651.36 = 21,155.98 : x
  2. Step 2: Convert to fraction form
    54,439.12/81,651.36 = 21,155.98/x
  3. Step 3: Cross multiply
    54,439.12x = 81,651.36 × 21,155.98
  4. Step 4: Simplify right side
    54,439.12x = 1,727,414,539.13
  5. Step 5: Solve for x
    x = 1,727,414,539.13/54,439.12
  6. Step 6: Final answer
    x = 31,731.13

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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.