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Finding the Fourth Proportional to 78,918.12, 108,906.66 and 44,928

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Solution

The fourth proportional to 78,918.12, 108,906.66 and 44,928 is: 62,000.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,918.12 : 108,906.66 = 44,928 : x
  2. Step 2: Convert to fraction form
    78,918.12/108,906.66 = 44,928/x
  3. Step 3: Cross multiply
    78,918.12x = 108,906.66 × 44,928
  4. Step 4: Simplify right side
    78,918.12x = 4,892,958,420.48
  5. Step 5: Solve for x
    x = 4,892,958,420.48/78,918.12
  6. Step 6: Final answer
    x = 62,000.44

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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.