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Finding the Fourth Proportional to 354,633.72, 531,911.13 and 126,920.16

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Solution

The fourth proportional to 354,633.72, 531,911.13 and 126,920.16 is: 190,366.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,633.72 : 531,911.13 = 126,920.16 : x
  2. Step 2: Convert to fraction form
    354,633.72/531,911.13 = 126,920.16/x
  3. Step 3: Cross multiply
    354,633.72x = 531,911.13 × 126,920.16
  4. Step 4: Simplify right side
    354,633.72x = 67,510,245,725.38
  5. Step 5: Solve for x
    x = 67,510,245,725.38/354,633.72
  6. Step 6: Final answer
    x = 190,366.12

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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.