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Finding the Fourth Proportional to 207,154.51, 285,912.54 and 129,666.12

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Solution

The fourth proportional to 207,154.51, 285,912.54 and 129,666.12 is: 178,963.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,154.51 : 285,912.54 = 129,666.12 : x
  2. Step 2: Convert to fraction form
    207,154.51/285,912.54 = 129,666.12/x
  3. Step 3: Cross multiply
    207,154.51x = 285,912.54 × 129,666.12
  4. Step 4: Simplify right side
    207,154.51x = 37,073,169,721.14
  5. Step 5: Solve for x
    x = 37,073,169,721.14/207,154.51
  6. Step 6: Final answer
    x = 178,963.86

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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.