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Finding the Fourth Proportional to 40,419.80, 60,629.70 and 31,995.80

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Solution

The fourth proportional to 40,419.80, 60,629.70 and 31,995.80 is: 47,993.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,419.80 : 60,629.70 = 31,995.80 : x
  2. Step 2: Convert to fraction form
    40,419.80/60,629.70 = 31,995.80/x
  3. Step 3: Cross multiply
    40,419.80x = 60,629.70 × 31,995.80
  4. Step 4: Simplify right side
    40,419.80x = 1,939,895,755.26
  5. Step 5: Solve for x
    x = 1,939,895,755.26/40,419.80
  6. Step 6: Final answer
    x = 47,993.70

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Similar ratio
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1.5x scale

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.