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Finding the Fourth Proportional to 74,963.20, 112,372.80 and 43,340.80

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Solution

The fourth proportional to 74,963.20, 112,372.80 and 43,340.80 is: 64,969.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,963.20 : 112,372.80 = 43,340.80 : x
  2. Step 2: Convert to fraction form
    74,963.20/112,372.80 = 43,340.80/x
  3. Step 3: Cross multiply
    74,963.20x = 112,372.80 × 43,340.80
  4. Step 4: Simplify right side
    74,963.20x = 4,870,327,050.24
  5. Step 5: Solve for x
    x = 4,870,327,050.24/74,963.20
  6. Step 6: Final answer
    x = 64,969.57

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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.