Home / 54,436.50-81,659.91-21,159.12

Finding the Fourth Proportional to 54,436.50, 81,659.91 and 21,159.12

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Solution

The fourth proportional to 54,436.50, 81,659.91 and 21,159.12 is: 31,740.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,436.50 : 81,659.91 = 21,159.12 : x
  2. Step 2: Convert to fraction form
    54,436.50/81,659.91 = 21,159.12/x
  3. Step 3: Cross multiply
    54,436.50x = 81,659.91 × 21,159.12
  4. Step 4: Simplify right side
    54,436.50x = 1,727,851,834.88
  5. Step 5: Solve for x
    x = 1,727,851,834.88/54,436.50
  6. Step 6: Final answer
    x = 31,740.69

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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.