Home / 54,330.13-81,479.40-21,042.78

Finding the Fourth Proportional to 54,330.13, 81,479.40 and 21,042.78

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Solution

The fourth proportional to 54,330.13, 81,479.40 and 21,042.78 is: 31,558.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,330.13 : 81,479.40 = 21,042.78 : x
  2. Step 2: Convert to fraction form
    54,330.13/81,479.40 = 21,042.78/x
  3. Step 3: Cross multiply
    54,330.13x = 81,479.40 × 21,042.78
  4. Step 4: Simplify right side
    54,330.13x = 1,714,553,088.73
  5. Step 5: Solve for x
    x = 1,714,553,088.73/54,330.13
  6. Step 6: Final answer
    x = 31,558.05

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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.