Home / 128,565.60-177,233.88-90,205.56

Finding the Fourth Proportional to 128,565.60, 177,233.88 and 90,205.56

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Solution

The fourth proportional to 128,565.60, 177,233.88 and 90,205.56 is: 124,352.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,565.60 : 177,233.88 = 90,205.56 : x
  2. Step 2: Convert to fraction form
    128,565.60/177,233.88 = 90,205.56/x
  3. Step 3: Cross multiply
    128,565.60x = 177,233.88 × 90,205.56
  4. Step 4: Simplify right side
    128,565.60x = 15,987,481,396.37
  5. Step 5: Solve for x
    x = 15,987,481,396.37/128,565.60
  6. Step 6: Final answer
    x = 124,352.71

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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.