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Finding the Fourth Proportional to 69,818.88, 104,728.32 and 57,480.96

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Solution

The fourth proportional to 69,818.88, 104,728.32 and 57,480.96 is: 86,221.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,818.88 : 104,728.32 = 57,480.96 : x
  2. Step 2: Convert to fraction form
    69,818.88/104,728.32 = 57,480.96/x
  3. Step 3: Cross multiply
    69,818.88x = 104,728.32 × 57,480.96
  4. Step 4: Simplify right side
    69,818.88x = 6,019,884,372.79
  5. Step 5: Solve for x
    x = 6,019,884,372.79/69,818.88
  6. Step 6: Final answer
    x = 86,221.44

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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.