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Finding the Fourth Proportional to 61,689.70, 85,131.68 and 33,395.38

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Solution

The fourth proportional to 61,689.70, 85,131.68 and 33,395.38 is: 46,085.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,689.70 : 85,131.68 = 33,395.38 : x
  2. Step 2: Convert to fraction form
    61,689.70/85,131.68 = 33,395.38/x
  3. Step 3: Cross multiply
    61,689.70x = 85,131.68 × 33,395.38
  4. Step 4: Simplify right side
    61,689.70x = 2,843,004,803.64
  5. Step 5: Solve for x
    x = 2,843,004,803.64/61,689.70
  6. Step 6: Final answer
    x = 46,085.57

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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.