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Finding the Fourth Proportional to 69,919, 96,489.85 and 39,699.52

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Solution

The fourth proportional to 69,919, 96,489.85 and 39,699.52 is: 54,786.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,919 : 96,489.85 = 39,699.52 : x
  2. Step 2: Convert to fraction form
    69,919/96,489.85 = 39,699.52/x
  3. Step 3: Cross multiply
    69,919x = 96,489.85 × 39,699.52
  4. Step 4: Simplify right side
    69,919x = 3,830,600,729.87
  5. Step 5: Solve for x
    x = 3,830,600,729.87/69,919
  6. Step 6: Final answer
    x = 54,786.26

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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.