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Finding the Fourth Proportional to 171,352.80, 257,029.20 and 121,489.20

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Solution

The fourth proportional to 171,352.80, 257,029.20 and 121,489.20 is: 182,233.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,352.80 : 257,029.20 = 121,489.20 : x
  2. Step 2: Convert to fraction form
    171,352.80/257,029.20 = 121,489.20/x
  3. Step 3: Cross multiply
    171,352.80x = 257,029.20 × 121,489.20
  4. Step 4: Simplify right side
    171,352.80x = 31,226,271,884.64
  5. Step 5: Solve for x
    x = 31,226,271,884.64/171,352.80
  6. Step 6: Final answer
    x = 182,233.80

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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.