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Finding the Fourth Proportional to 70,409.25, 97,172.90 and 40,198.88

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Solution

The fourth proportional to 70,409.25, 97,172.90 and 40,198.88 is: 55,479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,409.25 : 97,172.90 = 40,198.88 : x
  2. Step 2: Convert to fraction form
    70,409.25/97,172.90 = 40,198.88/x
  3. Step 3: Cross multiply
    70,409.25x = 97,172.90 × 40,198.88
  4. Step 4: Simplify right side
    70,409.25x = 3,906,241,939.04
  5. Step 5: Solve for x
    x = 3,906,241,939.04/70,409.25
  6. Step 6: Final answer
    x = 55,479.10

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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.