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Finding the Fourth Proportional to 211,926.64, 317,885.64 and 85,563.52

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Solution

The fourth proportional to 211,926.64, 317,885.64 and 85,563.52 is: 128,343.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,926.64 : 317,885.64 = 85,563.52 : x
  2. Step 2: Convert to fraction form
    211,926.64/317,885.64 = 85,563.52/x
  3. Step 3: Cross multiply
    211,926.64x = 317,885.64 × 85,563.52
  4. Step 4: Simplify right side
    211,926.64x = 27,199,414,315.85
  5. Step 5: Solve for x
    x = 27,199,414,315.85/211,926.64
  6. Step 6: Final answer
    x = 128,343.54

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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.