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Finding the Fourth Proportional to 53,159.20, 79,738.80 and 48,320.80

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Solution

The fourth proportional to 53,159.20, 79,738.80 and 48,320.80 is: 72,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,159.20 : 79,738.80 = 48,320.80 : x
  2. Step 2: Convert to fraction form
    53,159.20/79,738.80 = 48,320.80/x
  3. Step 3: Cross multiply
    53,159.20x = 79,738.80 × 48,320.80
  4. Step 4: Simplify right side
    53,159.20x = 3,853,042,607.04
  5. Step 5: Solve for x
    x = 3,853,042,607.04/53,159.20
  6. Step 6: Final answer
    x = 72,481.20

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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.