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Finding the Fourth Proportional to 41,111.70, 61,669.04 and 21,115.80

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Solution

The fourth proportional to 41,111.70, 61,669.04 and 21,115.80 is: 31,674.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,111.70 : 61,669.04 = 21,115.80 : x
  2. Step 2: Convert to fraction form
    41,111.70/61,669.04 = 21,115.80/x
  3. Step 3: Cross multiply
    41,111.70x = 61,669.04 × 21,115.80
  4. Step 4: Simplify right side
    41,111.70x = 1,302,191,009.25
  5. Step 5: Solve for x
    x = 1,302,191,009.25/41,111.70
  6. Step 6: Final answer
    x = 31,674.46

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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.