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Finding the Fourth Proportional to 157,791.14, 217,752.30 and 86,171.45

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Solution

The fourth proportional to 157,791.14, 217,752.30 and 86,171.45 is: 118,916.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,791.14 : 217,752.30 = 86,171.45 : x
  2. Step 2: Convert to fraction form
    157,791.14/217,752.30 = 86,171.45/x
  3. Step 3: Cross multiply
    157,791.14x = 217,752.30 × 86,171.45
  4. Step 4: Simplify right side
    157,791.14x = 18,764,030,343.07
  5. Step 5: Solve for x
    x = 18,764,030,343.07/157,791.14
  6. Step 6: Final answer
    x = 118,916.88

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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.