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Finding the Fourth Proportional to 210,568.33, 315,885.30 and 126,308.69

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Solution

The fourth proportional to 210,568.33, 315,885.30 and 126,308.69 is: 189,482.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,568.33 : 315,885.30 = 126,308.69 : x
  2. Step 2: Convert to fraction form
    210,568.33/315,885.30 = 126,308.69/x
  3. Step 3: Cross multiply
    210,568.33x = 315,885.30 × 126,308.69
  4. Step 4: Simplify right side
    210,568.33x = 39,899,057,564.74
  5. Step 5: Solve for x
    x = 39,899,057,564.74/210,568.33
  6. Step 6: Final answer
    x = 189,482.71

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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.