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Finding the Fourth Proportional to 74,642.61, 111,883.98 and 37,121.90

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Solution

The fourth proportional to 74,642.61, 111,883.98 and 37,121.90 is: 55,643.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,642.61 : 111,883.98 = 37,121.90 : x
  2. Step 2: Convert to fraction form
    74,642.61/111,883.98 = 37,121.90/x
  3. Step 3: Cross multiply
    74,642.61x = 111,883.98 × 37,121.90
  4. Step 4: Simplify right side
    74,642.61x = 4,153,345,496.95
  5. Step 5: Solve for x
    x = 4,153,345,496.95/74,642.61
  6. Step 6: Final answer
    x = 55,643.09

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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.