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Finding the Fourth Proportional to 69,909.67, 96,478.76 and 39,694.45

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Solution

The fourth proportional to 69,909.67, 96,478.76 and 39,694.45 is: 54,780.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,909.67 : 96,478.76 = 39,694.45 : x
  2. Step 2: Convert to fraction form
    69,909.67/96,478.76 = 39,694.45/x
  3. Step 3: Cross multiply
    69,909.67x = 96,478.76 × 39,694.45
  4. Step 4: Simplify right side
    69,909.67x = 3,829,670,832.49
  5. Step 5: Solve for x
    x = 3,829,670,832.49/69,909.67
  6. Step 6: Final answer
    x = 54,780.27

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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.