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Finding the Fourth Proportional to 74,845.92, 112,349.76 and 66,578.88

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Solution

The fourth proportional to 74,845.92, 112,349.76 and 66,578.88 is: 99,940.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,845.92 : 112,349.76 = 66,578.88 : x
  2. Step 2: Convert to fraction form
    74,845.92/112,349.76 = 66,578.88/x
  3. Step 3: Cross multiply
    74,845.92x = 112,349.76 × 66,578.88
  4. Step 4: Simplify right side
    74,845.92x = 7,480,121,189.07
  5. Step 5: Solve for x
    x = 7,480,121,189.07/74,845.92
  6. Step 6: Final answer
    x = 99,940.27

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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.