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Finding the Fourth Proportional to 128,934.10, 193,401.15 and 115,374.70

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Solution

The fourth proportional to 128,934.10, 193,401.15 and 115,374.70 is: 173,062.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,934.10 : 193,401.15 = 115,374.70 : x
  2. Step 2: Convert to fraction form
    128,934.10/193,401.15 = 115,374.70/x
  3. Step 3: Cross multiply
    128,934.10x = 193,401.15 × 115,374.70
  4. Step 4: Simplify right side
    128,934.10x = 22,313,599,660.91
  5. Step 5: Solve for x
    x = 22,313,599,660.91/128,934.10
  6. Step 6: Final answer
    x = 173,062.05

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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.