Home / 128,820.77-177,585.78-90,463.52

Finding the Fourth Proportional to 128,820.77, 177,585.78 and 90,463.52

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Solution

The fourth proportional to 128,820.77, 177,585.78 and 90,463.52 is: 124,708.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,820.77 : 177,585.78 = 90,463.52 : x
  2. Step 2: Convert to fraction form
    128,820.77/177,585.78 = 90,463.52/x
  3. Step 3: Cross multiply
    128,820.77x = 177,585.78 × 90,463.52
  4. Step 4: Simplify right side
    128,820.77x = 16,065,034,760.75
  5. Step 5: Solve for x
    x = 16,065,034,760.75/128,820.77
  6. Step 6: Final answer
    x = 124,708.42

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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.