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Finding the Fourth Proportional to 171,213.04, 256,921.12 and 77,717.44

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Solution

The fourth proportional to 171,213.04, 256,921.12 and 77,717.44 is: 116,622.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,213.04 : 256,921.12 = 77,717.44 : x
  2. Step 2: Convert to fraction form
    171,213.04/256,921.12 = 77,717.44/x
  3. Step 3: Cross multiply
    171,213.04x = 256,921.12 × 77,717.44
  4. Step 4: Simplify right side
    171,213.04x = 19,967,251,728.33
  5. Step 5: Solve for x
    x = 19,967,251,728.33/171,213.04
  6. Step 6: Final answer
    x = 116,622.26

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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.