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Finding the Fourth Proportional to 171,583.20, 257,520.60 and 138,340.80

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Solution

The fourth proportional to 171,583.20, 257,520.60 and 138,340.80 is: 207,628.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,583.20 : 257,520.60 = 138,340.80 : x
  2. Step 2: Convert to fraction form
    171,583.20/257,520.60 = 138,340.80/x
  3. Step 3: Cross multiply
    171,583.20x = 257,520.60 × 138,340.80
  4. Step 4: Simplify right side
    171,583.20x = 35,625,605,820.48
  5. Step 5: Solve for x
    x = 35,625,605,820.48/171,583.20
  6. Step 6: Final answer
    x = 207,628.75

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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.