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Finding the Fourth Proportional to 88,305, 121,860.90 and 48,561

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Solution

The fourth proportional to 88,305, 121,860.90 and 48,561 is: 67,014.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,305 : 121,860.90 = 48,561 : x
  2. Step 2: Convert to fraction form
    88,305/121,860.90 = 48,561/x
  3. Step 3: Cross multiply
    88,305x = 121,860.90 × 48,561
  4. Step 4: Simplify right side
    88,305x = 5,917,687,164.90
  5. Step 5: Solve for x
    x = 5,917,687,164.90/88,305
  6. Step 6: Final answer
    x = 67,014.18

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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.