Home / 90,731.15-135,932.70-55,629.80

Finding the Fourth Proportional to 90,731.15, 135,932.70 and 55,629.80

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Solution

The fourth proportional to 90,731.15, 135,932.70 and 55,629.80 is: 83,344.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,731.15 : 135,932.70 = 55,629.80 : x
  2. Step 2: Convert to fraction form
    90,731.15/135,932.70 = 55,629.80/x
  3. Step 3: Cross multiply
    90,731.15x = 135,932.70 × 55,629.80
  4. Step 4: Simplify right side
    90,731.15x = 7,561,908,914.46
  5. Step 5: Solve for x
    x = 7,561,908,914.46/90,731.15
  6. Step 6: Final answer
    x = 83,344.13

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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.