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Finding the Fourth Proportional to 61,651, 85,091.97 and 40,103.20

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Solution

The fourth proportional to 61,651, 85,091.97 and 40,103.20 is: 55,351.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,651 : 85,091.97 = 40,103.20 : x
  2. Step 2: Convert to fraction form
    61,651/85,091.97 = 40,103.20/x
  3. Step 3: Cross multiply
    61,651x = 85,091.97 × 40,103.20
  4. Step 4: Simplify right side
    61,651x = 3,412,460,291.30
  5. Step 5: Solve for x
    x = 3,412,460,291.30/61,651
  6. Step 6: Final answer
    x = 55,351.26

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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.