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Finding the Fourth Proportional to 61,865.78, 85,380.09 and 35,016.86

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Solution

The fourth proportional to 61,865.78, 85,380.09 and 35,016.86 is: 48,326.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,865.78 : 85,380.09 = 35,016.86 : x
  2. Step 2: Convert to fraction form
    61,865.78/85,380.09 = 35,016.86/x
  3. Step 3: Cross multiply
    61,865.78x = 85,380.09 × 35,016.86
  4. Step 4: Simplify right side
    61,865.78x = 2,989,742,658.32
  5. Step 5: Solve for x
    x = 2,989,742,658.32/61,865.78
  6. Step 6: Final answer
    x = 48,326.27

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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.