Home / 128,280.54-176,840.91-89,920.56

Finding the Fourth Proportional to 128,280.54, 176,840.91 and 89,920.56

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Solution

The fourth proportional to 128,280.54, 176,840.91 and 89,920.56 is: 123,959.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,280.54 : 176,840.91 = 89,920.56 : x
  2. Step 2: Convert to fraction form
    128,280.54/176,840.91 = 89,920.56/x
  3. Step 3: Cross multiply
    128,280.54x = 176,840.91 × 89,920.56
  4. Step 4: Simplify right side
    128,280.54x = 15,901,633,658.11
  5. Step 5: Solve for x
    x = 15,901,633,658.11/128,280.54
  6. Step 6: Final answer
    x = 123,959.83

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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.