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Finding the Fourth Proportional to 68,990.78, 103,459.44 and 26,864.84

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Solution

The fourth proportional to 68,990.78, 103,459.44 and 26,864.84 is: 40,286.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,990.78 : 103,459.44 = 26,864.84 : x
  2. Step 2: Convert to fraction form
    68,990.78/103,459.44 = 26,864.84/x
  3. Step 3: Cross multiply
    68,990.78x = 103,459.44 × 26,864.84
  4. Step 4: Simplify right side
    68,990.78x = 2,779,421,302.09
  5. Step 5: Solve for x
    x = 2,779,421,302.09/68,990.78
  6. Step 6: Final answer
    x = 40,286.85

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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.