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Finding the Fourth Proportional to 61,729.60, 92,594.40 and 20,180.80

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Solution

The fourth proportional to 61,729.60, 92,594.40 and 20,180.80 is: 30,271.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,729.60 : 92,594.40 = 20,180.80 : x
  2. Step 2: Convert to fraction form
    61,729.60/92,594.40 = 20,180.80/x
  3. Step 3: Cross multiply
    61,729.60x = 92,594.40 × 20,180.80
  4. Step 4: Simplify right side
    61,729.60x = 1,868,629,067.52
  5. Step 5: Solve for x
    x = 1,868,629,067.52/61,729.60
  6. Step 6: Final answer
    x = 30,271.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.