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Finding the Fourth Proportional to 210,650.71, 316,055.87 and 126,469.66

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Solution

The fourth proportional to 210,650.71, 316,055.87 and 126,469.66 is: 189,752.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,650.71 : 316,055.87 = 126,469.66 : x
  2. Step 2: Convert to fraction form
    210,650.71/316,055.87 = 126,469.66/x
  3. Step 3: Cross multiply
    210,650.71x = 316,055.87 × 126,469.66
  4. Step 4: Simplify right side
    210,650.71x = 39,971,478,419.90
  5. Step 5: Solve for x
    x = 39,971,478,419.90/210,650.71
  6. Step 6: Final answer
    x = 189,752.40

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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.