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Finding the Fourth Proportional to 77,899.60, 107,515.44 and 74,349.82

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Solution

The fourth proportional to 77,899.60, 107,515.44 and 74,349.82 is: 102,616.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,899.60 : 107,515.44 = 74,349.82 : x
  2. Step 2: Convert to fraction form
    77,899.60/107,515.44 = 74,349.82/x
  3. Step 3: Cross multiply
    77,899.60x = 107,515.44 × 74,349.82
  4. Step 4: Simplify right side
    77,899.60x = 7,993,753,611.22
  5. Step 5: Solve for x
    x = 7,993,753,611.22/77,899.60
  6. Step 6: Final answer
    x = 102,616.11

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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.