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Finding the Fourth Proportional to 171,916.20, 257,874.30 and 157,141.80

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Solution

The fourth proportional to 171,916.20, 257,874.30 and 157,141.80 is: 235,712.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,916.20 : 257,874.30 = 157,141.80 : x
  2. Step 2: Convert to fraction form
    171,916.20/257,874.30 = 157,141.80/x
  3. Step 3: Cross multiply
    171,916.20x = 257,874.30 × 157,141.80
  4. Step 4: Simplify right side
    171,916.20x = 40,522,831,675.74
  5. Step 5: Solve for x
    x = 40,522,831,675.74/171,916.20
  6. Step 6: Final answer
    x = 235,712.70

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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.