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Finding the Fourth Proportional to 341,781.76, 512,684.94 and 128,530.12

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Solution

The fourth proportional to 341,781.76, 512,684.94 and 128,530.12 is: 192,799.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,781.76 : 512,684.94 = 128,530.12 : x
  2. Step 2: Convert to fraction form
    341,781.76/512,684.94 = 128,530.12/x
  3. Step 3: Cross multiply
    341,781.76x = 512,684.94 × 128,530.12
  4. Step 4: Simplify right side
    341,781.76x = 65,895,456,860.39
  5. Step 5: Solve for x
    x = 65,895,456,860.39/341,781.76
  6. Step 6: Final answer
    x = 192,799.81

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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.