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Finding the Fourth Proportional to 69,868, 96,425.13 and 39,661.48

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Solution

The fourth proportional to 69,868, 96,425.13 and 39,661.48 is: 54,736.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,868 : 96,425.13 = 39,661.48 : x
  2. Step 2: Convert to fraction form
    69,868/96,425.13 = 39,661.48/x
  3. Step 3: Cross multiply
    69,868x = 96,425.13 × 39,661.48
  4. Step 4: Simplify right side
    69,868x = 3,824,363,364.99
  5. Step 5: Solve for x
    x = 3,824,363,364.99/69,868
  6. Step 6: Final answer
    x = 54,736.98

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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.