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Finding the Fourth Proportional to 211,223.19, 316,801.67 and 69,067.47

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Solution

The fourth proportional to 211,223.19, 316,801.67 and 69,067.47 is: 103,590.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,223.19 : 316,801.67 = 69,067.47 : x
  2. Step 2: Convert to fraction form
    211,223.19/316,801.67 = 69,067.47/x
  3. Step 3: Cross multiply
    211,223.19x = 316,801.67 × 69,067.47
  4. Step 4: Simplify right side
    211,223.19x = 21,880,689,493.34
  5. Step 5: Solve for x
    x = 21,880,689,493.34/211,223.19
  6. Step 6: Final answer
    x = 103,590.38

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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.