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Finding the Fourth Proportional to 206,007.10, 308,890.35 and 87,617.50

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Solution

The fourth proportional to 206,007.10, 308,890.35 and 87,617.50 is: 131,375.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,007.10 : 308,890.35 = 87,617.50 : x
  2. Step 2: Convert to fraction form
    206,007.10/308,890.35 = 87,617.50/x
  3. Step 3: Cross multiply
    206,007.10x = 308,890.35 × 87,617.50
  4. Step 4: Simplify right side
    206,007.10x = 27,064,200,241.13
  5. Step 5: Solve for x
    x = 27,064,200,241.13/206,007.10
  6. Step 6: Final answer
    x = 131,375.08

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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.