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Finding the Fourth Proportional to 211,496.60, 317,171.10 and 85,104.10

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Solution

The fourth proportional to 211,496.60, 317,171.10 and 85,104.10 is: 127,626.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,496.60 : 317,171.10 = 85,104.10 : x
  2. Step 2: Convert to fraction form
    211,496.60/317,171.10 = 85,104.10/x
  3. Step 3: Cross multiply
    211,496.60x = 317,171.10 × 85,104.10
  4. Step 4: Simplify right side
    211,496.60x = 26,992,561,011.51
  5. Step 5: Solve for x
    x = 26,992,561,011.51/211,496.60
  6. Step 6: Final answer
    x = 127,626.45

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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.