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Finding the Fourth Proportional to 61,172.72, 84,418.40 and 35,696.60

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Solution

The fourth proportional to 61,172.72, 84,418.40 and 35,696.60 is: 49,261.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,172.72 : 84,418.40 = 35,696.60 : x
  2. Step 2: Convert to fraction form
    61,172.72/84,418.40 = 35,696.60/x
  3. Step 3: Cross multiply
    61,172.72x = 84,418.40 × 35,696.60
  4. Step 4: Simplify right side
    61,172.72x = 3,013,449,857.44
  5. Step 5: Solve for x
    x = 3,013,449,857.44/61,172.72
  6. Step 6: Final answer
    x = 49,261.34

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1.5x scale

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.