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Finding the Fourth Proportional to 211,168.88, 316,720.32 and 69,013.04

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Solution

The fourth proportional to 211,168.88, 316,720.32 and 69,013.04 is: 103,508.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,168.88 : 316,720.32 = 69,013.04 : x
  2. Step 2: Convert to fraction form
    211,168.88/316,720.32 = 69,013.04/x
  3. Step 3: Cross multiply
    211,168.88x = 316,720.32 × 69,013.04
  4. Step 4: Simplify right side
    211,168.88x = 21,857,832,112.97
  5. Step 5: Solve for x
    x = 21,857,832,112.97/211,168.88
  6. Step 6: Final answer
    x = 103,508.78

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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.