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Finding the Fourth Proportional to 215,707.44, 297,698.52 and 129,694.56

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Solution

The fourth proportional to 215,707.44, 297,698.52 and 129,694.56 is: 178,991.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,707.44 : 297,698.52 = 129,694.56 : x
  2. Step 2: Convert to fraction form
    215,707.44/297,698.52 = 129,694.56/x
  3. Step 3: Cross multiply
    215,707.44x = 297,698.52 × 129,694.56
  4. Step 4: Simplify right side
    215,707.44x = 38,609,878,564.05
  5. Step 5: Solve for x
    x = 38,609,878,564.05/215,707.44
  6. Step 6: Final answer
    x = 178,991.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.