Home / 129,639.76-194,459.62-31,143.76

Finding the Fourth Proportional to 129,639.76, 194,459.62 and 31,143.76

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Solution

The fourth proportional to 129,639.76, 194,459.62 and 31,143.76 is: 46,715.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,639.76 : 194,459.62 = 31,143.76 : x
  2. Step 2: Convert to fraction form
    129,639.76/194,459.62 = 31,143.76/x
  3. Step 3: Cross multiply
    129,639.76x = 194,459.62 × 31,143.76
  4. Step 4: Simplify right side
    129,639.76x = 6,056,203,734.97
  5. Step 5: Solve for x
    x = 6,056,203,734.97/129,639.76
  6. Step 6: Final answer
    x = 46,715.64

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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.