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Finding the Fourth Proportional to 74,567.61, 102,906.90 and 42,736.59

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Solution

The fourth proportional to 74,567.61, 102,906.90 and 42,736.59 is: 58,978.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,567.61 : 102,906.90 = 42,736.59 : x
  2. Step 2: Convert to fraction form
    74,567.61/102,906.90 = 42,736.59/x
  3. Step 3: Cross multiply
    74,567.61x = 102,906.90 × 42,736.59
  4. Step 4: Simplify right side
    74,567.61x = 4,397,889,993.47
  5. Step 5: Solve for x
    x = 4,397,889,993.47/74,567.61
  6. Step 6: Final answer
    x = 58,978.56

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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.