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Finding the Fourth Proportional to 61,689.21, 85,131.71 and 36,196.01

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Solution

The fourth proportional to 61,689.21, 85,131.71 and 36,196.01 is: 49,950.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,689.21 : 85,131.71 = 36,196.01 : x
  2. Step 2: Convert to fraction form
    61,689.21/85,131.71 = 36,196.01/x
  3. Step 3: Cross multiply
    61,689.21x = 85,131.71 × 36,196.01
  4. Step 4: Simplify right side
    61,689.21x = 3,081,428,553.68
  5. Step 5: Solve for x
    x = 3,081,428,553.68/61,689.21
  6. Step 6: Final answer
    x = 49,950.85

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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.