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Finding the Fourth Proportional to 128,354.91, 192,531.69 and 34,860.66

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Solution

The fourth proportional to 128,354.91, 192,531.69 and 34,860.66 is: 52,290.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,354.91 : 192,531.69 = 34,860.66 : x
  2. Step 2: Convert to fraction form
    128,354.91/192,531.69 = 34,860.66/x
  3. Step 3: Cross multiply
    128,354.91x = 192,531.69 × 34,860.66
  4. Step 4: Simplify right side
    128,354.91x = 6,711,781,784.32
  5. Step 5: Solve for x
    x = 6,711,781,784.32/128,354.91
  6. Step 6: Final answer
    x = 52,290.81

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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.