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Finding the Fourth Proportional to 129,729, 194,619.10 and 40,995.56

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Solution

The fourth proportional to 129,729, 194,619.10 and 40,995.56 is: 61,501.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,729 : 194,619.10 = 40,995.56 : x
  2. Step 2: Convert to fraction form
    129,729/194,619.10 = 40,995.56/x
  3. Step 3: Cross multiply
    129,729x = 194,619.10 × 40,995.56
  4. Step 4: Simplify right side
    129,729x = 7,978,518,991.20
  5. Step 5: Solve for x
    x = 7,978,518,991.20/129,729
  6. Step 6: Final answer
    x = 61,501.43

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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.