Home / 90,786.40-135,567.60-74,179.28

Finding the Fourth Proportional to 90,786.40, 135,567.60 and 74,179.28

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Solution

The fourth proportional to 90,786.40, 135,567.60 and 74,179.28 is: 110,768.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,786.40 : 135,567.60 = 74,179.28 : x
  2. Step 2: Convert to fraction form
    90,786.40/135,567.60 = 74,179.28/x
  3. Step 3: Cross multiply
    90,786.40x = 135,567.60 × 74,179.28
  4. Step 4: Simplify right side
    90,786.40x = 10,056,306,959.33
  5. Step 5: Solve for x
    x = 10,056,306,959.33/90,786.40
  6. Step 6: Final answer
    x = 110,768.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.