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Finding the Fourth Proportional to 68,381.55, 102,575.52 and 20,994.75

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Solution

The fourth proportional to 68,381.55, 102,575.52 and 20,994.75 is: 31,493.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,381.55 : 102,575.52 = 20,994.75 : x
  2. Step 2: Convert to fraction form
    68,381.55/102,575.52 = 20,994.75/x
  3. Step 3: Cross multiply
    68,381.55x = 102,575.52 × 20,994.75
  4. Step 4: Simplify right side
    68,381.55x = 2,153,547,398.52
  5. Step 5: Solve for x
    x = 2,153,547,398.52/68,381.55
  6. Step 6: Final answer
    x = 31,493.11

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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.