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Finding the Fourth Proportional to 206,816.90, 310,225.35 and 135,958.10

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Solution

The fourth proportional to 206,816.90, 310,225.35 and 135,958.10 is: 203,937.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,816.90 : 310,225.35 = 135,958.10 : x
  2. Step 2: Convert to fraction form
    206,816.90/310,225.35 = 135,958.10/x
  3. Step 3: Cross multiply
    206,816.90x = 310,225.35 × 135,958.10
  4. Step 4: Simplify right side
    206,816.90x = 42,177,649,157.84
  5. Step 5: Solve for x
    x = 42,177,649,157.84/206,816.90
  6. Step 6: Final answer
    x = 203,937.15

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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.