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Finding the Fourth Proportional to 207,914.40, 312,017.40 and 133,216.20

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Solution

The fourth proportional to 207,914.40, 312,017.40 and 133,216.20 is: 199,917.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,914.40 : 312,017.40 = 133,216.20 : x
  2. Step 2: Convert to fraction form
    207,914.40/312,017.40 = 133,216.20/x
  3. Step 3: Cross multiply
    207,914.40x = 312,017.40 × 133,216.20
  4. Step 4: Simplify right side
    207,914.40x = 41,565,772,361.88
  5. Step 5: Solve for x
    x = 41,565,772,361.88/207,914.40
  6. Step 6: Final answer
    x = 199,917.72

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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.