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Finding the Fourth Proportional to 74,791.70, 103,210.74 and 42,962.66

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Solution

The fourth proportional to 74,791.70, 103,210.74 and 42,962.66 is: 59,287.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,791.70 : 103,210.74 = 42,962.66 : x
  2. Step 2: Convert to fraction form
    74,791.70/103,210.74 = 42,962.66/x
  3. Step 3: Cross multiply
    74,791.70x = 103,210.74 × 42,962.66
  4. Step 4: Simplify right side
    74,791.70x = 4,434,207,414.91
  5. Step 5: Solve for x
    x = 4,434,207,414.91/74,791.70
  6. Step 6: Final answer
    x = 59,287.43

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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.