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Finding the Fourth Proportional to 156,842.71, 235,131.80 and 68,029.32

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Solution

The fourth proportional to 156,842.71, 235,131.80 and 68,029.32 is: 101,986.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,842.71 : 235,131.80 = 68,029.32 : x
  2. Step 2: Convert to fraction form
    156,842.71/235,131.80 = 68,029.32/x
  3. Step 3: Cross multiply
    156,842.71x = 235,131.80 × 68,029.32
  4. Step 4: Simplify right side
    156,842.71x = 15,995,856,464.38
  5. Step 5: Solve for x
    x = 15,995,856,464.38/156,842.71
  6. Step 6: Final answer
    x = 101,986.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.