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Finding the Fourth Proportional to 203,990.96, 306,106.20 and 85,653.20

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Solution

The fourth proportional to 203,990.96, 306,106.20 and 85,653.20 is: 128,530.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,990.96 : 306,106.20 = 85,653.20 : x
  2. Step 2: Convert to fraction form
    203,990.96/306,106.20 = 85,653.20/x
  3. Step 3: Cross multiply
    203,990.96x = 306,106.20 × 85,653.20
  4. Step 4: Simplify right side
    203,990.96x = 26,218,975,569.84
  5. Step 5: Solve for x
    x = 26,218,975,569.84/203,990.96
  6. Step 6: Final answer
    x = 128,530.09

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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.