Home / 211,722.18-317,341.68-85,281.45

Finding the Fourth Proportional to 211,722.18, 317,341.68 and 85,281.45

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Solution

The fourth proportional to 211,722.18, 317,341.68 and 85,281.45 is: 127,824.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,722.18 : 317,341.68 = 85,281.45 : x
  2. Step 2: Convert to fraction form
    211,722.18/317,341.68 = 85,281.45/x
  3. Step 3: Cross multiply
    211,722.18x = 317,341.68 × 85,281.45
  4. Step 4: Simplify right side
    211,722.18x = 27,063,358,615.84
  5. Step 5: Solve for x
    x = 27,063,358,615.84/211,722.18
  6. Step 6: Final answer
    x = 127,824.86

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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.