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Finding the Fourth Proportional to 171,916.20, 257,874.30 and 108,930.60

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Solution

The fourth proportional to 171,916.20, 257,874.30 and 108,930.60 is: 163,395.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,916.20 : 257,874.30 = 108,930.60 : x
  2. Step 2: Convert to fraction form
    171,916.20/257,874.30 = 108,930.60/x
  3. Step 3: Cross multiply
    171,916.20x = 257,874.30 × 108,930.60
  4. Step 4: Simplify right side
    171,916.20x = 28,090,402,223.58
  5. Step 5: Solve for x
    x = 28,090,402,223.58/171,916.20
  6. Step 6: Final answer
    x = 163,395.90

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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.