Home / 128,749.80-192,687.30-113,003.40

Finding the Fourth Proportional to 128,749.80, 192,687.30 and 113,003.40

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Solution

The fourth proportional to 128,749.80, 192,687.30 and 113,003.40 is: 169,121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,749.80 : 192,687.30 = 113,003.40 : x
  2. Step 2: Convert to fraction form
    128,749.80/192,687.30 = 113,003.40/x
  3. Step 3: Cross multiply
    128,749.80x = 192,687.30 × 113,003.40
  4. Step 4: Simplify right side
    128,749.80x = 21,774,320,036.82
  5. Step 5: Solve for x
    x = 21,774,320,036.82/128,749.80
  6. Step 6: Final answer
    x = 169,121.20

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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.