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Finding the Fourth Proportional to 211,493.60, 317,166.61 and 85,101.10

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Solution

The fourth proportional to 211,493.60, 317,166.61 and 85,101.10 is: 127,621.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,493.60 : 317,166.61 = 85,101.10 : x
  2. Step 2: Convert to fraction form
    211,493.60/317,166.61 = 85,101.10/x
  3. Step 3: Cross multiply
    211,493.60x = 317,166.61 × 85,101.10
  4. Step 4: Simplify right side
    211,493.60x = 26,991,227,394.27
  5. Step 5: Solve for x
    x = 26,991,227,394.27/211,493.60
  6. Step 6: Final answer
    x = 127,621.96

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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.