Home / 211,355.40-317,076.30-71,128.20

Finding the Fourth Proportional to 211,355.40, 317,076.30 and 71,128.20

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Solution

The fourth proportional to 211,355.40, 317,076.30 and 71,128.20 is: 106,706.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,355.40 : 317,076.30 = 71,128.20 : x
  2. Step 2: Convert to fraction form
    211,355.40/317,076.30 = 71,128.20/x
  3. Step 3: Cross multiply
    211,355.40x = 317,076.30 × 71,128.20
  4. Step 4: Simplify right side
    211,355.40x = 22,553,066,481.66
  5. Step 5: Solve for x
    x = 22,553,066,481.66/211,355.40
  6. Step 6: Final answer
    x = 106,706.84

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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.