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Finding the Fourth Proportional to 78,432.77, 117,663.74 and 25,844.33

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Solution

The fourth proportional to 78,432.77, 117,663.74 and 25,844.33 is: 38,771.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,432.77 : 117,663.74 = 25,844.33 : x
  2. Step 2: Convert to fraction form
    78,432.77/117,663.74 = 25,844.33/x
  3. Step 3: Cross multiply
    78,432.77x = 117,663.74 × 25,844.33
  4. Step 4: Simplify right side
    78,432.77x = 3,040,940,396.37
  5. Step 5: Solve for x
    x = 3,040,940,396.37/78,432.77
  6. Step 6: Final answer
    x = 38,771.30

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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.