Home / 129,936.72-194,905.08-31,440.72

Finding the Fourth Proportional to 129,936.72, 194,905.08 and 31,440.72

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Solution

The fourth proportional to 129,936.72, 194,905.08 and 31,440.72 is: 47,161.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,936.72 : 194,905.08 = 31,440.72 : x
  2. Step 2: Convert to fraction form
    129,936.72/194,905.08 = 31,440.72/x
  3. Step 3: Cross multiply
    129,936.72x = 194,905.08 × 31,440.72
  4. Step 4: Simplify right side
    129,936.72x = 6,127,956,046.86
  5. Step 5: Solve for x
    x = 6,127,956,046.86/129,936.72
  6. Step 6: Final answer
    x = 47,161.08

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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.