Home / 211,990.20-317,985.30-71,746.80

Finding the Fourth Proportional to 211,990.20, 317,985.30 and 71,746.80

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Solution

The fourth proportional to 211,990.20, 317,985.30 and 71,746.80 is: 107,620.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,990.20 : 317,985.30 = 71,746.80 : x
  2. Step 2: Convert to fraction form
    211,990.20/317,985.30 = 71,746.80/x
  3. Step 3: Cross multiply
    211,990.20x = 317,985.30 × 71,746.80
  4. Step 4: Simplify right side
    211,990.20x = 22,814,427,722.04
  5. Step 5: Solve for x
    x = 22,814,427,722.04/211,990.20
  6. Step 6: Final answer
    x = 107,620.20

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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.