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Finding the Fourth Proportional to 211,332.80, 317,047.80 and 69,182.66

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Solution

The fourth proportional to 211,332.80, 317,047.80 and 69,182.66 is: 103,789.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,332.80 : 317,047.80 = 69,182.66 : x
  2. Step 2: Convert to fraction form
    211,332.80/317,047.80 = 69,182.66/x
  3. Step 3: Cross multiply
    211,332.80x = 317,047.80 × 69,182.66
  4. Step 4: Simplify right side
    211,332.80x = 21,934,211,203.20
  5. Step 5: Solve for x
    x = 21,934,211,203.20/211,332.80
  6. Step 6: Final answer
    x = 103,789.90

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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.