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Finding the Fourth Proportional to 171,146.71, 256,625.25 and 70,015.78

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Solution

The fourth proportional to 171,146.71, 256,625.25 and 70,015.78 is: 104,984.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,146.71 : 256,625.25 = 70,015.78 : x
  2. Step 2: Convert to fraction form
    171,146.71/256,625.25 = 70,015.78/x
  3. Step 3: Cross multiply
    171,146.71x = 256,625.25 × 70,015.78
  4. Step 4: Simplify right side
    171,146.71x = 17,967,817,046.45
  5. Step 5: Solve for x
    x = 17,967,817,046.45/171,146.71
  6. Step 6: Final answer
    x = 104,984.88

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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.