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Finding the Fourth Proportional to 171,165.40, 256,874.12 and 81,208.28

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Solution

The fourth proportional to 171,165.40, 256,874.12 and 81,208.28 is: 121,872.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,165.40 : 256,874.12 = 81,208.28 : x
  2. Step 2: Convert to fraction form
    171,165.40/256,874.12 = 81,208.28/x
  3. Step 3: Cross multiply
    171,165.40x = 256,874.12 × 81,208.28
  4. Step 4: Simplify right side
    171,165.40x = 20,860,306,002.39
  5. Step 5: Solve for x
    x = 20,860,306,002.39/171,165.40
  6. Step 6: Final answer
    x = 121,872.21

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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.