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Finding the Fourth Proportional to 206,597.80, 309,378.30 and 136,095.40

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Solution

The fourth proportional to 206,597.80, 309,378.30 and 136,095.40 is: 203,801.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,597.80 : 309,378.30 = 136,095.40 : x
  2. Step 2: Convert to fraction form
    206,597.80/309,378.30 = 136,095.40/x
  3. Step 3: Cross multiply
    206,597.80x = 309,378.30 × 136,095.40
  4. Step 4: Simplify right side
    206,597.80x = 42,104,963,489.82
  5. Step 5: Solve for x
    x = 42,104,963,489.82/206,597.80
  6. Step 6: Final answer
    x = 203,801.61

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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.