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Finding the Fourth Proportional to 149,365.71, 206,326.10 and 138,736.89

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Solution

The fourth proportional to 149,365.71, 206,326.10 and 138,736.89 is: 191,644.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,365.71 : 206,326.10 = 138,736.89 : x
  2. Step 2: Convert to fraction form
    149,365.71/206,326.10 = 138,736.89/x
  3. Step 3: Cross multiply
    149,365.71x = 206,326.10 × 138,736.89
  4. Step 4: Simplify right side
    149,365.71x = 28,625,041,786.67
  5. Step 5: Solve for x
    x = 28,625,041,786.67/149,365.71
  6. Step 6: Final answer
    x = 191,644.00

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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.