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Finding the Fourth Proportional to 61,898.28, 85,419.97 and 36,405.72

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Solution

The fourth proportional to 61,898.28, 85,419.97 and 36,405.72 is: 50,240.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,898.28 : 85,419.97 = 36,405.72 : x
  2. Step 2: Convert to fraction form
    61,898.28/85,419.97 = 36,405.72/x
  3. Step 3: Cross multiply
    61,898.28x = 85,419.97 × 36,405.72
  4. Step 4: Simplify right side
    61,898.28x = 3,109,775,083.13
  5. Step 5: Solve for x
    x = 3,109,775,083.13/61,898.28
  6. Step 6: Final answer
    x = 50,240.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.