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Finding the Fourth Proportional to 53,308.80, 79,963.20 and 49,420.80

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Solution

The fourth proportional to 53,308.80, 79,963.20 and 49,420.80 is: 74,131.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,308.80 : 79,963.20 = 49,420.80 : x
  2. Step 2: Convert to fraction form
    53,308.80/79,963.20 = 49,420.80/x
  3. Step 3: Cross multiply
    53,308.80x = 79,963.20 × 49,420.80
  4. Step 4: Simplify right side
    53,308.80x = 3,951,845,314.56
  5. Step 5: Solve for x
    x = 3,951,845,314.56/53,308.80
  6. Step 6: Final answer
    x = 74,131.20

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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.