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Finding the Fourth Proportional to 171,940.70, 257,911.05 and 169,316.30

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Solution

The fourth proportional to 171,940.70, 257,911.05 and 169,316.30 is: 253,974.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,940.70 : 257,911.05 = 169,316.30 : x
  2. Step 2: Convert to fraction form
    171,940.70/257,911.05 = 169,316.30/x
  3. Step 3: Cross multiply
    171,940.70x = 257,911.05 × 169,316.30
  4. Step 4: Simplify right side
    171,940.70x = 43,668,544,715.12
  5. Step 5: Solve for x
    x = 43,668,544,715.12/171,940.70
  6. Step 6: Final answer
    x = 253,974.45

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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.