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Finding the Fourth Proportional to 261,024.70, 391,498.65 and 74,055.10

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Solution

The fourth proportional to 261,024.70, 391,498.65 and 74,055.10 is: 111,071.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,024.70 : 391,498.65 = 74,055.10 : x
  2. Step 2: Convert to fraction form
    261,024.70/391,498.65 = 74,055.10/x
  3. Step 3: Cross multiply
    261,024.70x = 391,498.65 × 74,055.10
  4. Step 4: Simplify right side
    261,024.70x = 28,992,471,675.62
  5. Step 5: Solve for x
    x = 28,992,471,675.62/261,024.70
  6. Step 6: Final answer
    x = 111,071.76

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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.