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Finding the Fourth Proportional to 207,171.70, 285,899.90 and 122,288.76

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Solution

The fourth proportional to 207,171.70, 285,899.90 and 122,288.76 is: 168,760.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,171.70 : 285,899.90 = 122,288.76 : x
  2. Step 2: Convert to fraction form
    207,171.70/285,899.90 = 122,288.76/x
  3. Step 3: Cross multiply
    207,171.70x = 285,899.90 × 122,288.76
  4. Step 4: Simplify right side
    207,171.70x = 34,962,343,643.68
  5. Step 5: Solve for x
    x = 34,962,343,643.68/207,171.70
  6. Step 6: Final answer
    x = 168,760.23

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1.5x scale

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.