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Finding the Fourth Proportional to 69,918.50, 96,489.16 and 39,699.02

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Solution

The fourth proportional to 69,918.50, 96,489.16 and 39,699.02 is: 54,785.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,918.50 : 96,489.16 = 39,699.02 : x
  2. Step 2: Convert to fraction form
    69,918.50/96,489.16 = 39,699.02/x
  3. Step 3: Cross multiply
    69,918.50x = 96,489.16 × 39,699.02
  4. Step 4: Simplify right side
    69,918.50x = 3,830,525,092.62
  5. Step 5: Solve for x
    x = 3,830,525,092.62/69,918.50
  6. Step 6: Final answer
    x = 54,785.57

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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.