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Finding the Fourth Proportional to 171,242.88, 256,938.17 and 66,135.66

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Solution

The fourth proportional to 171,242.88, 256,938.17 and 66,135.66 is: 99,232.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,242.88 : 256,938.17 = 66,135.66 : x
  2. Step 2: Convert to fraction form
    171,242.88/256,938.17 = 66,135.66/x
  3. Step 3: Cross multiply
    171,242.88x = 256,938.17 × 66,135.66
  4. Step 4: Simplify right side
    171,242.88x = 16,992,775,121.46
  5. Step 5: Solve for x
    x = 16,992,775,121.46/171,242.88
  6. Step 6: Final answer
    x = 99,232.01

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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.