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Finding the Fourth Proportional to 69,910.32, 96,478.56 and 39,696.96

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Solution

The fourth proportional to 69,910.32, 96,478.56 and 39,696.96 is: 54,783.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,910.32 : 96,478.56 = 39,696.96 : x
  2. Step 2: Convert to fraction form
    69,910.32/96,478.56 = 39,696.96/x
  3. Step 3: Cross multiply
    69,910.32x = 96,478.56 × 39,696.96
  4. Step 4: Simplify right side
    69,910.32x = 3,829,905,537.18
  5. Step 5: Solve for x
    x = 3,829,905,537.18/69,910.32
  6. Step 6: Final answer
    x = 54,783.12

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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.