Home / 211,138.78-316,708.66-51,214.05

Finding the Fourth Proportional to 211,138.78, 316,708.66 and 51,214.05

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Solution

The fourth proportional to 211,138.78, 316,708.66 and 51,214.05 is: 76,821.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,138.78 : 316,708.66 = 51,214.05 : x
  2. Step 2: Convert to fraction form
    211,138.78/316,708.66 = 51,214.05/x
  3. Step 3: Cross multiply
    211,138.78x = 316,708.66 × 51,214.05
  4. Step 4: Simplify right side
    211,138.78x = 16,219,932,177.91
  5. Step 5: Solve for x
    x = 16,219,932,177.91/211,138.78
  6. Step 6: Final answer
    x = 76,821.19

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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.