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Finding the Fourth Proportional to 77,902.70, 107,505.90 and 43,911.32

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Solution

The fourth proportional to 77,902.70, 107,505.90 and 43,911.32 is: 60,597.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,902.70 : 107,505.90 = 43,911.32 : x
  2. Step 2: Convert to fraction form
    77,902.70/107,505.90 = 43,911.32/x
  3. Step 3: Cross multiply
    77,902.70x = 107,505.90 × 43,911.32
  4. Step 4: Simplify right side
    77,902.70x = 4,720,725,439.26
  5. Step 5: Solve for x
    x = 4,720,725,439.26/77,902.70
  6. Step 6: Final answer
    x = 60,597.72

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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.