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Finding the Fourth Proportional to 206,171.46, 309,159.45 and 79,870.86

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Solution

The fourth proportional to 206,171.46, 309,159.45 and 79,870.86 is: 119,768.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,171.46 : 309,159.45 = 79,870.86 : x
  2. Step 2: Convert to fraction form
    206,171.46/309,159.45 = 79,870.86/x
  3. Step 3: Cross multiply
    206,171.46x = 309,159.45 × 79,870.86
  4. Step 4: Simplify right side
    206,171.46x = 24,692,831,148.63
  5. Step 5: Solve for x
    x = 24,692,831,148.63/206,171.46
  6. Step 6: Final answer
    x = 119,768.43

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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.