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Finding the Fourth Proportional to 157,796.49, 217,760.88 and 86,178.60

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Solution

The fourth proportional to 157,796.49, 217,760.88 and 86,178.60 is: 118,927.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,796.49 : 217,760.88 = 86,178.60 : x
  2. Step 2: Convert to fraction form
    157,796.49/217,760.88 = 86,178.60/x
  3. Step 3: Cross multiply
    157,796.49x = 217,760.88 × 86,178.60
  4. Step 4: Simplify right side
    157,796.49x = 18,766,327,773.17
  5. Step 5: Solve for x
    x = 18,766,327,773.17/157,796.49
  6. Step 6: Final answer
    x = 118,927.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.