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Finding the Fourth Proportional to 211,353.72, 317,066.22 and 71,079

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Solution

The fourth proportional to 211,353.72, 317,066.22 and 71,079 is: 106,630.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,353.72 : 317,066.22 = 71,079 : x
  2. Step 2: Convert to fraction form
    211,353.72/317,066.22 = 71,079/x
  3. Step 3: Cross multiply
    211,353.72x = 317,066.22 × 71,079
  4. Step 4: Simplify right side
    211,353.72x = 22,536,749,851.38
  5. Step 5: Solve for x
    x = 22,536,749,851.38/211,353.72
  6. Step 6: Final answer
    x = 106,630.49

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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.