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Finding the Fourth Proportional to 61,791.76, 85,208.64 and 52,868.80

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Solution

The fourth proportional to 61,791.76, 85,208.64 and 52,868.80 is: 72,904.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,791.76 : 85,208.64 = 52,868.80 : x
  2. Step 2: Convert to fraction form
    61,791.76/85,208.64 = 52,868.80/x
  3. Step 3: Cross multiply
    61,791.76x = 85,208.64 × 52,868.80
  4. Step 4: Simplify right side
    61,791.76x = 4,504,878,546.43
  5. Step 5: Solve for x
    x = 4,504,878,546.43/61,791.76
  6. Step 6: Final answer
    x = 72,904.20

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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.