Home / 211,281.91-317,047.45-78,255.61

Finding the Fourth Proportional to 211,281.91, 317,047.45 and 78,255.61

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Solution

The fourth proportional to 211,281.91, 317,047.45 and 78,255.61 is: 117,429.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,281.91 : 317,047.45 = 78,255.61 : x
  2. Step 2: Convert to fraction form
    211,281.91/317,047.45 = 78,255.61/x
  3. Step 3: Cross multiply
    211,281.91x = 317,047.45 × 78,255.61
  4. Step 4: Simplify right side
    211,281.91x = 24,810,741,598.69
  5. Step 5: Solve for x
    x = 24,810,741,598.69/211,281.91
  6. Step 6: Final answer
    x = 117,429.56

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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.