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Finding the Fourth Proportional to 128,862.59, 193,369.20 and 53,976.36

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Solution

The fourth proportional to 128,862.59, 193,369.20 and 53,976.36 is: 80,996.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,862.59 : 193,369.20 = 53,976.36 : x
  2. Step 2: Convert to fraction form
    128,862.59/193,369.20 = 53,976.36/x
  3. Step 3: Cross multiply
    128,862.59x = 193,369.20 × 53,976.36
  4. Step 4: Simplify right side
    128,862.59x = 10,437,365,552.11
  5. Step 5: Solve for x
    x = 10,437,365,552.11/128,862.59
  6. Step 6: Final answer
    x = 80,996.09

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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.