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Finding the Fourth Proportional to 74,037.80, 111,056.70 and 71,850.80

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Solution

The fourth proportional to 74,037.80, 111,056.70 and 71,850.80 is: 107,776.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,037.80 : 111,056.70 = 71,850.80 : x
  2. Step 2: Convert to fraction form
    74,037.80/111,056.70 = 71,850.80/x
  3. Step 3: Cross multiply
    74,037.80x = 111,056.70 × 71,850.80
  4. Step 4: Simplify right side
    74,037.80x = 7,979,512,740.36
  5. Step 5: Solve for x
    x = 7,979,512,740.36/74,037.80
  6. Step 6: Final answer
    x = 107,776.20

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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.