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Finding the Fourth Proportional to 211,883.58, 317,821.20 and 85,520.46

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Solution

The fourth proportional to 211,883.58, 317,821.20 and 85,520.46 is: 128,279.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,883.58 : 317,821.20 = 85,520.46 : x
  2. Step 2: Convert to fraction form
    211,883.58/317,821.20 = 85,520.46/x
  3. Step 3: Cross multiply
    211,883.58x = 317,821.20 × 85,520.46
  4. Step 4: Simplify right side
    211,883.58x = 27,180,215,221.75
  5. Step 5: Solve for x
    x = 27,180,215,221.75/211,883.58
  6. Step 6: Final answer
    x = 128,279.01

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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.