Home / 122,921.70-183,945.15-85,305.30

Finding the Fourth Proportional to 122,921.70, 183,945.15 and 85,305.30

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Solution

The fourth proportional to 122,921.70, 183,945.15 and 85,305.30 is: 127,654.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,921.70 : 183,945.15 = 85,305.30 : x
  2. Step 2: Convert to fraction form
    122,921.70/183,945.15 = 85,305.30/x
  3. Step 3: Cross multiply
    122,921.70x = 183,945.15 × 85,305.30
  4. Step 4: Simplify right side
    122,921.70x = 15,691,496,204.30
  5. Step 5: Solve for x
    x = 15,691,496,204.30/122,921.70
  6. Step 6: Final answer
    x = 127,654.40

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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.