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Finding the Fourth Proportional to 68,772.80, 103,159.20 and 41,124.80

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Solution

The fourth proportional to 68,772.80, 103,159.20 and 41,124.80 is: 61,687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,772.80 : 103,159.20 = 41,124.80 : x
  2. Step 2: Convert to fraction form
    68,772.80/103,159.20 = 41,124.80/x
  3. Step 3: Cross multiply
    68,772.80x = 103,159.20 × 41,124.80
  4. Step 4: Simplify right side
    68,772.80x = 4,242,401,468.16
  5. Step 5: Solve for x
    x = 4,242,401,468.16/68,772.80
  6. Step 6: Final answer
    x = 61,687.20

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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.