Home / 211,429.64-317,138.31-78,306.95

Finding the Fourth Proportional to 211,429.64, 317,138.31 and 78,306.95

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Solution

The fourth proportional to 211,429.64, 317,138.31 and 78,306.95 is: 117,458.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,429.64 : 317,138.31 = 78,306.95 : x
  2. Step 2: Convert to fraction form
    211,429.64/317,138.31 = 78,306.95/x
  3. Step 3: Cross multiply
    211,429.64x = 317,138.31 × 78,306.95
  4. Step 4: Simplify right side
    211,429.64x = 24,834,132,198.56
  5. Step 5: Solve for x
    x = 24,834,132,198.56/211,429.64
  6. Step 6: Final answer
    x = 117,458.14

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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.