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Finding the Fourth Proportional to 61,921.30, 92,879.43 and 28,630.42

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Solution

The fourth proportional to 61,921.30, 92,879.43 and 28,630.42 is: 42,944.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,921.30 : 92,879.43 = 28,630.42 : x
  2. Step 2: Convert to fraction form
    61,921.30/92,879.43 = 28,630.42/x
  3. Step 3: Cross multiply
    61,921.30x = 92,879.43 × 28,630.42
  4. Step 4: Simplify right side
    61,921.30x = 2,659,177,090.26
  5. Step 5: Solve for x
    x = 2,659,177,090.26/61,921.30
  6. Step 6: Final answer
    x = 42,944.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.