Home / 207,157.20-285,865.92-122,243.28

Finding the Fourth Proportional to 207,157.20, 285,865.92 and 122,243.28

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Solution

The fourth proportional to 207,157.20, 285,865.92 and 122,243.28 is: 168,689.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,157.20 : 285,865.92 = 122,243.28 : x
  2. Step 2: Convert to fraction form
    207,157.20/285,865.92 = 122,243.28/x
  3. Step 3: Cross multiply
    207,157.20x = 285,865.92 × 122,243.28
  4. Step 4: Simplify right side
    207,157.20x = 34,945,187,701.02
  5. Step 5: Solve for x
    x = 34,945,187,701.02/207,157.20
  6. Step 6: Final answer
    x = 168,689.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.