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Finding the Fourth Proportional to 140,251.64, 193,539.58 and 86,540.54

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Solution

The fourth proportional to 140,251.64, 193,539.58 and 86,540.54 is: 119,421.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,251.64 : 193,539.58 = 86,540.54 : x
  2. Step 2: Convert to fraction form
    140,251.64/193,539.58 = 86,540.54/x
  3. Step 3: Cross multiply
    140,251.64x = 193,539.58 × 86,540.54
  4. Step 4: Simplify right side
    140,251.64x = 16,749,018,580.52
  5. Step 5: Solve for x
    x = 16,749,018,580.52/140,251.64
  6. Step 6: Final answer
    x = 119,421.20

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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.