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Finding the Fourth Proportional to 211,911.42, 317,866.32 and 54,139.62

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Solution

The fourth proportional to 211,911.42, 317,866.32 and 54,139.62 is: 81,209.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,911.42 : 317,866.32 = 54,139.62 : x
  2. Step 2: Convert to fraction form
    211,911.42/317,866.32 = 54,139.62/x
  3. Step 3: Cross multiply
    211,911.42x = 317,866.32 × 54,139.62
  4. Step 4: Simplify right side
    211,911.42x = 17,209,161,775.60
  5. Step 5: Solve for x
    x = 17,209,161,775.60/211,911.42
  6. Step 6: Final answer
    x = 81,209.22

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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.