Home / 207,721.40-311,582.10-74,622.20

Finding the Fourth Proportional to 207,721.40, 311,582.10 and 74,622.20

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Solution

The fourth proportional to 207,721.40, 311,582.10 and 74,622.20 is: 111,933.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,721.40 : 311,582.10 = 74,622.20 : x
  2. Step 2: Convert to fraction form
    207,721.40/311,582.10 = 74,622.20/x
  3. Step 3: Cross multiply
    207,721.40x = 311,582.10 × 74,622.20
  4. Step 4: Simplify right side
    207,721.40x = 23,250,941,782.62
  5. Step 5: Solve for x
    x = 23,250,941,782.62/207,721.40
  6. Step 6: Final answer
    x = 111,933.30

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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.