Home / 128,177.12-176,883.42-74,493.56

Finding the Fourth Proportional to 128,177.12, 176,883.42 and 74,493.56

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Solution

The fourth proportional to 128,177.12, 176,883.42 and 74,493.56 is: 102,800.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,177.12 : 176,883.42 = 74,493.56 : x
  2. Step 2: Convert to fraction form
    128,177.12/176,883.42 = 74,493.56/x
  3. Step 3: Cross multiply
    128,177.12x = 176,883.42 × 74,493.56
  4. Step 4: Simplify right side
    128,177.12x = 13,176,675,660.78
  5. Step 5: Solve for x
    x = 13,176,675,660.78/128,177.12
  6. Step 6: Final answer
    x = 102,800.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.