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Finding the Fourth Proportional to 61,243.72, 91,866.49 and 21,799.80

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Solution

The fourth proportional to 61,243.72, 91,866.49 and 21,799.80 is: 32,700.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,243.72 : 91,866.49 = 21,799.80 : x
  2. Step 2: Convert to fraction form
    61,243.72/91,866.49 = 21,799.80/x
  3. Step 3: Cross multiply
    61,243.72x = 91,866.49 × 21,799.80
  4. Step 4: Simplify right side
    61,243.72x = 2,002,671,054.20
  5. Step 5: Solve for x
    x = 2,002,671,054.20/61,243.72
  6. Step 6: Final answer
    x = 32,700.02

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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.