Home / 128,277.54-176,836.77-89,917.56

Finding the Fourth Proportional to 128,277.54, 176,836.77 and 89,917.56

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Solution

The fourth proportional to 128,277.54, 176,836.77 and 89,917.56 is: 123,955.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,277.54 : 176,836.77 = 89,917.56 : x
  2. Step 2: Convert to fraction form
    128,277.54/176,836.77 = 89,917.56/x
  3. Step 3: Cross multiply
    128,277.54x = 176,836.77 × 89,917.56
  4. Step 4: Simplify right side
    128,277.54x = 15,900,730,876.68
  5. Step 5: Solve for x
    x = 15,900,730,876.68/128,277.54
  6. Step 6: Final answer
    x = 123,955.69

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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.