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Finding the Fourth Proportional to 74,589.64, 102,971.78 and 57,555.61

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Solution

The fourth proportional to 74,589.64, 102,971.78 and 57,555.61 is: 79,456.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,589.64 : 102,971.78 = 57,555.61 : x
  2. Step 2: Convert to fraction form
    74,589.64/102,971.78 = 57,555.61/x
  3. Step 3: Cross multiply
    74,589.64x = 102,971.78 × 57,555.61
  4. Step 4: Simplify right side
    74,589.64x = 5,926,603,610.69
  5. Step 5: Solve for x
    x = 5,926,603,610.69/74,589.64
  6. Step 6: Final answer
    x = 79,456.12

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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.