Home / 90,405.15-124,672.56-54,100.43

Finding the Fourth Proportional to 90,405.15, 124,672.56 and 54,100.43

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Solution

The fourth proportional to 90,405.15, 124,672.56 and 54,100.43 is: 74,606.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,405.15 : 124,672.56 = 54,100.43 : x
  2. Step 2: Convert to fraction form
    90,405.15/124,672.56 = 54,100.43/x
  3. Step 3: Cross multiply
    90,405.15x = 124,672.56 × 54,100.43
  4. Step 4: Simplify right side
    90,405.15x = 6,744,838,481.84
  5. Step 5: Solve for x
    x = 6,744,838,481.84/90,405.15
  6. Step 6: Final answer
    x = 74,606.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.