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Finding the Fourth Proportional to 128,992.91, 193,490.45 and 35,503.79

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Solution

The fourth proportional to 128,992.91, 193,490.45 and 35,503.79 is: 53,255.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,992.91 : 193,490.45 = 35,503.79 : x
  2. Step 2: Convert to fraction form
    128,992.91/193,490.45 = 35,503.79/x
  3. Step 3: Cross multiply
    128,992.91x = 193,490.45 × 35,503.79
  4. Step 4: Simplify right side
    128,992.91x = 6,869,644,126.29
  5. Step 5: Solve for x
    x = 6,869,644,126.29/128,992.91
  6. Step 6: Final answer
    x = 53,255.98

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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.