Home / 211,309.20-316,997.28-69,107.76

Finding the Fourth Proportional to 211,309.20, 316,997.28 and 69,107.76

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Solution

The fourth proportional to 211,309.20, 316,997.28 and 69,107.76 is: 103,672.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,309.20 : 316,997.28 = 69,107.76 : x
  2. Step 2: Convert to fraction form
    211,309.20/316,997.28 = 69,107.76/x
  3. Step 3: Cross multiply
    211,309.20x = 316,997.28 × 69,107.76
  4. Step 4: Simplify right side
    211,309.20x = 21,906,971,946.89
  5. Step 5: Solve for x
    x = 21,906,971,946.89/211,309.20
  6. Step 6: Final answer
    x = 103,672.59

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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.