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Finding the Fourth Proportional to 171,145.71, 256,623.75 and 70,014.78

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Solution

The fourth proportional to 171,145.71, 256,623.75 and 70,014.78 is: 104,983.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,145.71 : 256,623.75 = 70,014.78 : x
  2. Step 2: Convert to fraction form
    171,145.71/256,623.75 = 70,014.78/x
  3. Step 3: Cross multiply
    171,145.71x = 256,623.75 × 70,014.78
  4. Step 4: Simplify right side
    171,145.71x = 17,967,455,399.03
  5. Step 5: Solve for x
    x = 17,967,455,399.03/171,145.71
  6. Step 6: Final answer
    x = 104,983.38

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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.