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Finding the Fourth Proportional to 171,917.20, 257,875.80 and 157,142.80

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Solution

The fourth proportional to 171,917.20, 257,875.80 and 157,142.80 is: 235,714.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,917.20 : 257,875.80 = 157,142.80 : x
  2. Step 2: Convert to fraction form
    171,917.20/257,875.80 = 157,142.80/x
  3. Step 3: Cross multiply
    171,917.20x = 257,875.80 × 157,142.80
  4. Step 4: Simplify right side
    171,917.20x = 40,523,325,264.24
  5. Step 5: Solve for x
    x = 40,523,325,264.24/171,917.20
  6. Step 6: Final answer
    x = 235,714.20

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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.