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Finding the Fourth Proportional to 72,441.76, 99,963.60 and 40,609.60

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Solution

The fourth proportional to 72,441.76, 99,963.60 and 40,609.60 is: 56,037.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,441.76 : 99,963.60 = 40,609.60 : x
  2. Step 2: Convert to fraction form
    72,441.76/99,963.60 = 40,609.60/x
  3. Step 3: Cross multiply
    72,441.76x = 99,963.60 × 40,609.60
  4. Step 4: Simplify right side
    72,441.76x = 4,059,481,810.56
  5. Step 5: Solve for x
    x = 4,059,481,810.56/72,441.76
  6. Step 6: Final answer
    x = 56,037.87

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1.5x scale

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.