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Finding the Fourth Proportional to 137,351.23, 205,983.17 and 128,385.51

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Solution

The fourth proportional to 137,351.23, 205,983.17 and 128,385.51 is: 192,537.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,351.23 : 205,983.17 = 128,385.51 : x
  2. Step 2: Convert to fraction form
    137,351.23/205,983.17 = 128,385.51/x
  3. Step 3: Cross multiply
    137,351.23x = 205,983.17 × 128,385.51
  4. Step 4: Simplify right side
    137,351.23x = 26,445,253,398.95
  5. Step 5: Solve for x
    x = 26,445,253,398.95/137,351.23
  6. Step 6: Final answer
    x = 192,537.44

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1.5x scale

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.