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Finding the Fourth Proportional to 207,165.40, 310,918.20 and 107,356.12

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Solution

The fourth proportional to 207,165.40, 310,918.20 and 107,356.12 is: 161,122.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,165.40 : 310,918.20 = 107,356.12 : x
  2. Step 2: Convert to fraction form
    207,165.40/310,918.20 = 107,356.12/x
  3. Step 3: Cross multiply
    207,165.40x = 310,918.20 × 107,356.12
  4. Step 4: Simplify right side
    207,165.40x = 33,378,971,589.38
  5. Step 5: Solve for x
    x = 33,378,971,589.38/207,165.40
  6. Step 6: Final answer
    x = 161,122.33

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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.