Home / 90,749.20-136,123.80-84,917.20

Finding the Fourth Proportional to 90,749.20, 136,123.80 and 84,917.20

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Solution

The fourth proportional to 90,749.20, 136,123.80 and 84,917.20 is: 127,375.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,749.20 : 136,123.80 = 84,917.20 : x
  2. Step 2: Convert to fraction form
    90,749.20/136,123.80 = 84,917.20/x
  3. Step 3: Cross multiply
    90,749.20x = 136,123.80 × 84,917.20
  4. Step 4: Simplify right side
    90,749.20x = 11,559,251,949.36
  5. Step 5: Solve for x
    x = 11,559,251,949.36/90,749.20
  6. Step 6: Final answer
    x = 127,375.80

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1.5x scale

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.