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Finding the Fourth Proportional to 76,922.78, 106,153.38 and 43,388.78

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Solution

The fourth proportional to 76,922.78, 106,153.38 and 43,388.78 is: 59,876.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,922.78 : 106,153.38 = 43,388.78 : x
  2. Step 2: Convert to fraction form
    76,922.78/106,153.38 = 43,388.78/x
  3. Step 3: Cross multiply
    76,922.78x = 106,153.38 × 43,388.78
  4. Step 4: Simplify right side
    76,922.78x = 4,605,865,651.08
  5. Step 5: Solve for x
    x = 4,605,865,651.08/76,922.78
  6. Step 6: Final answer
    x = 59,876.48

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1.5x scale

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.