Home / 211,788.87-317,612.83-85,396.47

Finding the Fourth Proportional to 211,788.87, 317,612.83 and 85,396.47

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Solution

The fourth proportional to 211,788.87, 317,612.83 and 85,396.47 is: 128,066.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,788.87 : 317,612.83 = 85,396.47 : x
  2. Step 2: Convert to fraction form
    211,788.87/317,612.83 = 85,396.47/x
  3. Step 3: Cross multiply
    211,788.87x = 317,612.83 × 85,396.47
  4. Step 4: Simplify right side
    211,788.87x = 27,123,014,508.71
  5. Step 5: Solve for x
    x = 27,123,014,508.71/211,788.87
  6. Step 6: Final answer
    x = 128,066.29

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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.