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Finding the Fourth Proportional to 61,646.78, 85,072.41 and 34,789.21

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Solution

The fourth proportional to 61,646.78, 85,072.41 and 34,789.21 is: 48,009.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,646.78 : 85,072.41 = 34,789.21 : x
  2. Step 2: Convert to fraction form
    61,646.78/85,072.41 = 34,789.21/x
  3. Step 3: Cross multiply
    61,646.78x = 85,072.41 × 34,789.21
  4. Step 4: Simplify right side
    61,646.78x = 2,959,601,724.02
  5. Step 5: Solve for x
    x = 2,959,601,724.02/61,646.78
  6. Step 6: Final answer
    x = 48,009.02

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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.