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Finding the Fourth Proportional to 61,722.78, 85,177.26 and 33,428.40

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Solution

The fourth proportional to 61,722.78, 85,177.26 and 33,428.40 is: 46,131.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,722.78 : 85,177.26 = 33,428.40 : x
  2. Step 2: Convert to fraction form
    61,722.78/85,177.26 = 33,428.40/x
  3. Step 3: Cross multiply
    61,722.78x = 85,177.26 × 33,428.40
  4. Step 4: Simplify right side
    61,722.78x = 2,847,339,518.18
  5. Step 5: Solve for x
    x = 2,847,339,518.18/61,722.78
  6. Step 6: Final answer
    x = 46,131.10

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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.