Home / 211,754.40-317,113.20-100,816.80

Finding the Fourth Proportional to 211,754.40, 317,113.20 and 100,816.80

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Solution

The fourth proportional to 211,754.40, 317,113.20 and 100,816.80 is: 150,978.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,754.40 : 317,113.20 = 100,816.80 : x
  2. Step 2: Convert to fraction form
    211,754.40/317,113.20 = 100,816.80/x
  3. Step 3: Cross multiply
    211,754.40x = 317,113.20 × 100,816.80
  4. Step 4: Simplify right side
    211,754.40x = 31,970,338,061.76
  5. Step 5: Solve for x
    x = 31,970,338,061.76/211,754.40
  6. Step 6: Final answer
    x = 150,978.39

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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.