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Finding the Fourth Proportional to 52,745.60, 79,090.02 and 21,139.80

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Solution

The fourth proportional to 52,745.60, 79,090.02 and 21,139.80 is: 31,698.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,745.60 : 79,090.02 = 21,139.80 : x
  2. Step 2: Convert to fraction form
    52,745.60/79,090.02 = 21,139.80/x
  3. Step 3: Cross multiply
    52,745.60x = 79,090.02 × 21,139.80
  4. Step 4: Simplify right side
    52,745.60x = 1,671,947,204.80
  5. Step 5: Solve for x
    x = 1,671,947,204.80/52,745.60
  6. Step 6: Final answer
    x = 31,698.33

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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.