Home / 128,278.20-177,019.86-90,093.24

Finding the Fourth Proportional to 128,278.20, 177,019.86 and 90,093.24

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Solution

The fourth proportional to 128,278.20, 177,019.86 and 90,093.24 is: 124,325.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,278.20 : 177,019.86 = 90,093.24 : x
  2. Step 2: Convert to fraction form
    128,278.20/177,019.86 = 90,093.24/x
  3. Step 3: Cross multiply
    128,278.20x = 177,019.86 × 90,093.24
  4. Step 4: Simplify right side
    128,278.20x = 15,948,292,731.75
  5. Step 5: Solve for x
    x = 15,948,292,731.75/128,278.20
  6. Step 6: Final answer
    x = 124,325.82

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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.