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Finding the Fourth Proportional to 74,199.76, 102,380.54 and 43,971.78

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Solution

The fourth proportional to 74,199.76, 102,380.54 and 43,971.78 is: 60,672.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,199.76 : 102,380.54 = 43,971.78 : x
  2. Step 2: Convert to fraction form
    74,199.76/102,380.54 = 43,971.78/x
  3. Step 3: Cross multiply
    74,199.76x = 102,380.54 × 43,971.78
  4. Step 4: Simplify right side
    74,199.76x = 4,501,854,581.16
  5. Step 5: Solve for x
    x = 4,501,854,581.16/74,199.76
  6. Step 6: Final answer
    x = 60,672.09

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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.