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Finding the Fourth Proportional to 56,645.40, 84,965.40 and 19,201.80

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Solution

The fourth proportional to 56,645.40, 84,965.40 and 19,201.80 is: 28,801.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,645.40 : 84,965.40 = 19,201.80 : x
  2. Step 2: Convert to fraction form
    56,645.40/84,965.40 = 19,201.80/x
  3. Step 3: Cross multiply
    56,645.40x = 84,965.40 × 19,201.80
  4. Step 4: Simplify right side
    56,645.40x = 1,631,488,617.72
  5. Step 5: Solve for x
    x = 1,631,488,617.72/56,645.40
  6. Step 6: Final answer
    x = 28,801.78

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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.