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Finding the Fourth Proportional to 112,644.90, 155,447.60 and 61,656.44

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Solution

The fourth proportional to 112,644.90, 155,447.60 and 61,656.44 is: 85,084.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,644.90 : 155,447.60 = 61,656.44 : x
  2. Step 2: Convert to fraction form
    112,644.90/155,447.60 = 61,656.44/x
  3. Step 3: Cross multiply
    112,644.90x = 155,447.60 × 61,656.44
  4. Step 4: Simplify right side
    112,644.90x = 9,584,344,537.02
  5. Step 5: Solve for x
    x = 9,584,344,537.02/112,644.90
  6. Step 6: Final answer
    x = 85,084.58

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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.