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Finding the Fourth Proportional to 171,188.66, 256,872.54 and 70,061.78

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Solution

The fourth proportional to 171,188.66, 256,872.54 and 70,061.78 is: 105,129.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,188.66 : 256,872.54 = 70,061.78 : x
  2. Step 2: Convert to fraction form
    171,188.66/256,872.54 = 70,061.78/x
  3. Step 3: Cross multiply
    171,188.66x = 256,872.54 × 70,061.78
  4. Step 4: Simplify right side
    171,188.66x = 17,996,946,101.16
  5. Step 5: Solve for x
    x = 17,996,946,101.16/171,188.66
  6. Step 6: Final answer
    x = 105,129.32

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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.