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Finding the Fourth Proportional to 138,109.94, 206,152.66 and 127,966.70

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Solution

The fourth proportional to 138,109.94, 206,152.66 and 127,966.70 is: 191,012.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,109.94 : 206,152.66 = 127,966.70 : x
  2. Step 2: Convert to fraction form
    138,109.94/206,152.66 = 127,966.70/x
  3. Step 3: Cross multiply
    138,109.94x = 206,152.66 × 127,966.70
  4. Step 4: Simplify right side
    138,109.94x = 26,380,675,596.42
  5. Step 5: Solve for x
    x = 26,380,675,596.42/138,109.94
  6. Step 6: Final answer
    x = 191,012.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.