Home / 156,079.21-215,390.31-91,535.29

Finding the Fourth Proportional to 156,079.21, 215,390.31 and 91,535.29

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Solution

The fourth proportional to 156,079.21, 215,390.31 and 91,535.29 is: 126,319.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,079.21 : 215,390.31 = 91,535.29 : x
  2. Step 2: Convert to fraction form
    156,079.21/215,390.31 = 91,535.29/x
  3. Step 3: Cross multiply
    156,079.21x = 215,390.31 × 91,535.29
  4. Step 4: Simplify right side
    156,079.21x = 19,715,814,489.04
  5. Step 5: Solve for x
    x = 19,715,814,489.04/156,079.21
  6. Step 6: Final answer
    x = 126,319.29

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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.