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Finding the Fourth Proportional to 112,884, 155,781.42 and 61,896.60

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Solution

The fourth proportional to 112,884, 155,781.42 and 61,896.60 is: 85,418.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,884 : 155,781.42 = 61,896.60 : x
  2. Step 2: Convert to fraction form
    112,884/155,781.42 = 61,896.60/x
  3. Step 3: Cross multiply
    112,884x = 155,781.42 × 61,896.60
  4. Step 4: Simplify right side
    112,884x = 9,642,340,241.17
  5. Step 5: Solve for x
    x = 9,642,340,241.17/112,884
  6. Step 6: Final answer
    x = 85,418.13

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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.