Home / 212,720.20-319,080.30-133,988.20

Finding the Fourth Proportional to 212,720.20, 319,080.30 and 133,988.20

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Solution

The fourth proportional to 212,720.20, 319,080.30 and 133,988.20 is: 200,982.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,720.20 : 319,080.30 = 133,988.20 : x
  2. Step 2: Convert to fraction form
    212,720.20/319,080.30 = 133,988.20/x
  3. Step 3: Cross multiply
    212,720.20x = 319,080.30 × 133,988.20
  4. Step 4: Simplify right side
    212,720.20x = 42,752,995,052.46
  5. Step 5: Solve for x
    x = 42,752,995,052.46/212,720.20
  6. Step 6: Final answer
    x = 200,982.30

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1.5x scale

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.