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Finding the Fourth Proportional to 68,790.36, 94,929.74 and 38,575.66

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Solution

The fourth proportional to 68,790.36, 94,929.74 and 38,575.66 is: 53,233.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,790.36 : 94,929.74 = 38,575.66 : x
  2. Step 2: Convert to fraction form
    68,790.36/94,929.74 = 38,575.66/x
  3. Step 3: Cross multiply
    68,790.36x = 94,929.74 × 38,575.66
  4. Step 4: Simplify right side
    68,790.36x = 3,661,977,374.13
  5. Step 5: Solve for x
    x = 3,661,977,374.13/68,790.36
  6. Step 6: Final answer
    x = 53,233.87

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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.