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Finding the Fourth Proportional to 171,338.20, 257,007.30 and 156,563.80

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Solution

The fourth proportional to 171,338.20, 257,007.30 and 156,563.80 is: 234,845.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,338.20 : 257,007.30 = 156,563.80 : x
  2. Step 2: Convert to fraction form
    171,338.20/257,007.30 = 156,563.80/x
  3. Step 3: Cross multiply
    171,338.20x = 257,007.30 × 156,563.80
  4. Step 4: Simplify right side
    171,338.20x = 40,238,039,515.74
  5. Step 5: Solve for x
    x = 40,238,039,515.74/171,338.20
  6. Step 6: Final answer
    x = 234,845.70

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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.