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Finding the Fourth Proportional to 215,679.59, 323,519.39 and 65,920.31

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Solution

The fourth proportional to 215,679.59, 323,519.39 and 65,920.31 is: 98,880.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,679.59 : 323,519.39 = 65,920.31 : x
  2. Step 2: Convert to fraction form
    215,679.59/323,519.39 = 65,920.31/x
  3. Step 3: Cross multiply
    215,679.59x = 323,519.39 × 65,920.31
  4. Step 4: Simplify right side
    215,679.59x = 21,326,498,479.81
  5. Step 5: Solve for x
    x = 21,326,498,479.81/215,679.59
  6. Step 6: Final answer
    x = 98,880.47

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1.5x scale

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.