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Finding the Fourth Proportional to 88,181.15, 121,623.31 and 61,310.21

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Solution

The fourth proportional to 88,181.15, 121,623.31 and 61,310.21 is: 84,561.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,181.15 : 121,623.31 = 61,310.21 : x
  2. Step 2: Convert to fraction form
    88,181.15/121,623.31 = 61,310.21/x
  3. Step 3: Cross multiply
    88,181.15x = 121,623.31 × 61,310.21
  4. Step 4: Simplify right side
    88,181.15x = 7,456,751,057.69
  5. Step 5: Solve for x
    x = 7,456,751,057.69/88,181.15
  6. Step 6: Final answer
    x = 84,561.73

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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.