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Finding the Fourth Proportional to 140,873.91, 211,335.45 and 61,986.09

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Solution

The fourth proportional to 140,873.91, 211,335.45 and 61,986.09 is: 92,989.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,873.91 : 211,335.45 = 61,986.09 : x
  2. Step 2: Convert to fraction form
    140,873.91/211,335.45 = 61,986.09/x
  3. Step 3: Cross multiply
    140,873.91x = 211,335.45 × 61,986.09
  4. Step 4: Simplify right side
    140,873.91x = 13,099,858,223.89
  5. Step 5: Solve for x
    x = 13,099,858,223.89/140,873.91
  6. Step 6: Final answer
    x = 92,989.95

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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.