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Finding the Fourth Proportional to 172,234.62, 257,866.65 and 129,980.42

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Solution

The fourth proportional to 172,234.62, 257,866.65 and 129,980.42 is: 194,604.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,234.62 : 257,866.65 = 129,980.42 : x
  2. Step 2: Convert to fraction form
    172,234.62/257,866.65 = 129,980.42/x
  3. Step 3: Cross multiply
    172,234.62x = 257,866.65 × 129,980.42
  4. Step 4: Simplify right side
    172,234.62x = 33,517,615,470.99
  5. Step 5: Solve for x
    x = 33,517,615,470.99/172,234.62
  6. Step 6: Final answer
    x = 194,604.40

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1.5x scale

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.