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Finding the Fourth Proportional to 128,093.82, 176,746.17 and 89,969.85

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Solution

The fourth proportional to 128,093.82, 176,746.17 and 89,969.85 is: 124,142.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,093.82 : 176,746.17 = 89,969.85 : x
  2. Step 2: Convert to fraction form
    128,093.82/176,746.17 = 89,969.85/x
  3. Step 3: Cross multiply
    128,093.82x = 176,746.17 × 89,969.85
  4. Step 4: Simplify right side
    128,093.82x = 15,901,826,402.97
  5. Step 5: Solve for x
    x = 15,901,826,402.97/128,093.82
  6. Step 6: Final answer
    x = 124,142.03

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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.