Home / 54,437.86-81,641.20-21,150.78

Finding the Fourth Proportional to 54,437.86, 81,641.20 and 21,150.78

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Solution

The fourth proportional to 54,437.86, 81,641.20 and 21,150.78 is: 31,720.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,437.86 : 81,641.20 = 21,150.78 : x
  2. Step 2: Convert to fraction form
    54,437.86/81,641.20 = 21,150.78/x
  3. Step 3: Cross multiply
    54,437.86x = 81,641.20 × 21,150.78
  4. Step 4: Simplify right side
    54,437.86x = 1,726,775,060.14
  5. Step 5: Solve for x
    x = 1,726,775,060.14/54,437.86
  6. Step 6: Final answer
    x = 31,720.11

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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.