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Finding the Fourth Proportional to 61,138.98, 91,722.24 and 21,696.04

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Solution

The fourth proportional to 61,138.98, 91,722.24 and 21,696.04 is: 32,548.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,138.98 : 91,722.24 = 21,696.04 : x
  2. Step 2: Convert to fraction form
    61,138.98/91,722.24 = 21,696.04/x
  3. Step 3: Cross multiply
    61,138.98x = 91,722.24 × 21,696.04
  4. Step 4: Simplify right side
    61,138.98x = 1,990,009,387.93
  5. Step 5: Solve for x
    x = 1,990,009,387.93/61,138.98
  6. Step 6: Final answer
    x = 32,548.95

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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.