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Finding the Fourth Proportional to 207,086.32, 310,662.28 and 66,812.14

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Solution

The fourth proportional to 207,086.32, 310,662.28 and 66,812.14 is: 100,228.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,086.32 : 310,662.28 = 66,812.14 : x
  2. Step 2: Convert to fraction form
    207,086.32/310,662.28 = 66,812.14/x
  3. Step 3: Cross multiply
    207,086.32x = 310,662.28 × 66,812.14
  4. Step 4: Simplify right side
    207,086.32x = 20,756,010,190.77
  5. Step 5: Solve for x
    x = 20,756,010,190.77/207,086.32
  6. Step 6: Final answer
    x = 100,228.79

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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.