Home / 129,639.12-194,458.74-31,143.12

Finding the Fourth Proportional to 129,639.12, 194,458.74 and 31,143.12

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Solution

The fourth proportional to 129,639.12, 194,458.74 and 31,143.12 is: 46,714.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,639.12 : 194,458.74 = 31,143.12 : x
  2. Step 2: Convert to fraction form
    129,639.12/194,458.74 = 31,143.12/x
  3. Step 3: Cross multiply
    129,639.12x = 194,458.74 × 31,143.12
  4. Step 4: Simplify right side
    129,639.12x = 6,056,051,874.87
  5. Step 5: Solve for x
    x = 6,056,051,874.87/129,639.12
  6. Step 6: Final answer
    x = 46,714.69

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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.