Home / 129,875.85-194,813.78-103,631.85

Finding the Fourth Proportional to 129,875.85, 194,813.78 and 103,631.85

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Solution

The fourth proportional to 129,875.85, 194,813.78 and 103,631.85 is: 155,447.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,875.85 : 194,813.78 = 103,631.85 : x
  2. Step 2: Convert to fraction form
    129,875.85/194,813.78 = 103,631.85/x
  3. Step 3: Cross multiply
    129,875.85x = 194,813.78 × 103,631.85
  4. Step 4: Simplify right side
    129,875.85x = 20,188,912,426.89
  5. Step 5: Solve for x
    x = 20,188,912,426.89/129,875.85
  6. Step 6: Final answer
    x = 155,447.78

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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.