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Finding the Fourth Proportional to 74,572.64, 102,912.68 and 42,747.56

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Solution

The fourth proportional to 74,572.64, 102,912.68 and 42,747.56 is: 58,993.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,572.64 : 102,912.68 = 42,747.56 : x
  2. Step 2: Convert to fraction form
    74,572.64/102,912.68 = 42,747.56/x
  3. Step 3: Cross multiply
    74,572.64x = 102,912.68 × 42,747.56
  4. Step 4: Simplify right side
    74,572.64x = 4,399,265,963.06
  5. Step 5: Solve for x
    x = 4,399,265,963.06/74,572.64
  6. Step 6: Final answer
    x = 58,993.03

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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.