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Finding the Fourth Proportional to 49,720.40, 74,621.40 and 49,331.60

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Solution

The fourth proportional to 49,720.40, 74,621.40 and 49,331.60 is: 74,037.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,720.40 : 74,621.40 = 49,331.60 : x
  2. Step 2: Convert to fraction form
    49,720.40/74,621.40 = 49,331.60/x
  3. Step 3: Cross multiply
    49,720.40x = 74,621.40 × 49,331.60
  4. Step 4: Simplify right side
    49,720.40x = 3,681,193,056.24
  5. Step 5: Solve for x
    x = 3,681,193,056.24/49,720.40
  6. Step 6: Final answer
    x = 74,037.88

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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.