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Finding the Fourth Proportional to 74,480.78, 102,772.78 and 43,835.66

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Solution

The fourth proportional to 74,480.78, 102,772.78 and 43,835.66 is: 60,486.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,480.78 : 102,772.78 = 43,835.66 : x
  2. Step 2: Convert to fraction form
    74,480.78/102,772.78 = 43,835.66/x
  3. Step 3: Cross multiply
    74,480.78x = 102,772.78 × 43,835.66
  4. Step 4: Simplify right side
    74,480.78x = 4,505,112,641.33
  5. Step 5: Solve for x
    x = 4,505,112,641.33/74,480.78
  6. Step 6: Final answer
    x = 60,486.92

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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.