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Finding the Fourth Proportional to 208,296.59, 287,367.90 and 121,067.18

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Solution

The fourth proportional to 208,296.59, 287,367.90 and 121,067.18 is: 167,025.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,296.59 : 287,367.90 = 121,067.18 : x
  2. Step 2: Convert to fraction form
    208,296.59/287,367.90 = 121,067.18/x
  3. Step 3: Cross multiply
    208,296.59x = 287,367.90 × 121,067.18
  4. Step 4: Simplify right side
    208,296.59x = 34,790,821,275.52
  5. Step 5: Solve for x
    x = 34,790,821,275.52/208,296.59
  6. Step 6: Final answer
    x = 167,025.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.