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Finding the Fourth Proportional to 261,206.42, 391,678.41 and 121,063.46

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Solution

The fourth proportional to 261,206.42, 391,678.41 and 121,063.46 is: 181,534.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,206.42 : 391,678.41 = 121,063.46 : x
  2. Step 2: Convert to fraction form
    261,206.42/391,678.41 = 121,063.46/x
  3. Step 3: Cross multiply
    261,206.42x = 391,678.41 × 121,063.46
  4. Step 4: Simplify right side
    261,206.42x = 47,417,943,521.90
  5. Step 5: Solve for x
    x = 47,417,943,521.90/261,206.42
  6. Step 6: Final answer
    x = 181,534.37

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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.