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Finding the Fourth Proportional to 74,947.98, 103,428.50 and 40,956.48

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Solution

The fourth proportional to 74,947.98, 103,428.50 and 40,956.48 is: 56,520.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,947.98 : 103,428.50 = 40,956.48 : x
  2. Step 2: Convert to fraction form
    74,947.98/103,428.50 = 40,956.48/x
  3. Step 3: Cross multiply
    74,947.98x = 103,428.50 × 40,956.48
  4. Step 4: Simplify right side
    74,947.98x = 4,236,067,291.68
  5. Step 5: Solve for x
    x = 4,236,067,291.68/74,947.98
  6. Step 6: Final answer
    x = 56,520.10

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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.