Home / 80,961.40-121,247.70-39,359.80

Finding the Fourth Proportional to 80,961.40, 121,247.70 and 39,359.80

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Solution

The fourth proportional to 80,961.40, 121,247.70 and 39,359.80 is: 58,945.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,961.40 : 121,247.70 = 39,359.80 : x
  2. Step 2: Convert to fraction form
    80,961.40/121,247.70 = 39,359.80/x
  3. Step 3: Cross multiply
    80,961.40x = 121,247.70 × 39,359.80
  4. Step 4: Simplify right side
    80,961.40x = 4,772,285,222.46
  5. Step 5: Solve for x
    x = 4,772,285,222.46/80,961.40
  6. Step 6: Final answer
    x = 58,945.19

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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.