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Finding the Fourth Proportional to 128,854.97, 193,286.12 and 35,360.72

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Solution

The fourth proportional to 128,854.97, 193,286.12 and 35,360.72 is: 53,042.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,854.97 : 193,286.12 = 35,360.72 : x
  2. Step 2: Convert to fraction form
    128,854.97/193,286.12 = 35,360.72/x
  3. Step 3: Cross multiply
    128,854.97x = 193,286.12 × 35,360.72
  4. Step 4: Simplify right side
    128,854.97x = 6,834,735,950.80
  5. Step 5: Solve for x
    x = 6,834,735,950.80/128,854.97
  6. Step 6: Final answer
    x = 53,042.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.