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Finding the Fourth Proportional to 156,297.88, 215,678.32 and 91,760.32

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Solution

The fourth proportional to 156,297.88, 215,678.32 and 91,760.32 is: 126,621.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,297.88 : 215,678.32 = 91,760.32 : x
  2. Step 2: Convert to fraction form
    156,297.88/215,678.32 = 91,760.32/x
  3. Step 3: Cross multiply
    156,297.88x = 215,678.32 × 91,760.32
  4. Step 4: Simplify right side
    156,297.88x = 19,790,711,660.26
  5. Step 5: Solve for x
    x = 19,790,711,660.26/156,297.88
  6. Step 6: Final answer
    x = 126,621.75

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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.