Home / 129,660.45-194,490.70-40,920.90

Finding the Fourth Proportional to 129,660.45, 194,490.70 and 40,920.90

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Solution

The fourth proportional to 129,660.45, 194,490.70 and 40,920.90 is: 61,381.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,660.45 : 194,490.70 = 40,920.90 : x
  2. Step 2: Convert to fraction form
    129,660.45/194,490.70 = 40,920.90/x
  3. Step 3: Cross multiply
    129,660.45x = 194,490.70 × 40,920.90
  4. Step 4: Simplify right side
    129,660.45x = 7,958,734,485.63
  5. Step 5: Solve for x
    x = 7,958,734,485.63/129,660.45
  6. Step 6: Final answer
    x = 61,381.36

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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.