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Finding the Fourth Proportional to 140,335.86, 193,661.21 and 76,672.28

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Solution

The fourth proportional to 140,335.86, 193,661.21 and 76,672.28 is: 105,806.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,335.86 : 193,661.21 = 76,672.28 : x
  2. Step 2: Convert to fraction form
    140,335.86/193,661.21 = 76,672.28/x
  3. Step 3: Cross multiply
    140,335.86x = 193,661.21 × 76,672.28
  4. Step 4: Simplify right side
    140,335.86x = 14,848,446,518.26
  5. Step 5: Solve for x
    x = 14,848,446,518.26/140,335.86
  6. Step 6: Final answer
    x = 105,806.50

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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.