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Finding the Fourth Proportional to 138,801.52, 209,066.86 and 129,068.56

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Solution

The fourth proportional to 138,801.52, 209,066.86 and 129,068.56 is: 194,406.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,801.52 : 209,066.86 = 129,068.56 : x
  2. Step 2: Convert to fraction form
    138,801.52/209,066.86 = 129,068.56/x
  3. Step 3: Cross multiply
    138,801.52x = 209,066.86 × 129,068.56
  4. Step 4: Simplify right side
    138,801.52x = 26,983,958,563.92
  5. Step 5: Solve for x
    x = 26,983,958,563.92/138,801.52
  6. Step 6: Final answer
    x = 194,406.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.