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Finding the Fourth Proportional to 140,456.78, 193,830.71 and 76,798.69

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Solution

The fourth proportional to 140,456.78, 193,830.71 and 76,798.69 is: 105,982.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,456.78 : 193,830.71 = 76,798.69 : x
  2. Step 2: Convert to fraction form
    140,456.78/193,830.71 = 76,798.69/x
  3. Step 3: Cross multiply
    140,456.78x = 193,830.71 × 76,798.69
  4. Step 4: Simplify right side
    140,456.78x = 14,885,944,609.77
  5. Step 5: Solve for x
    x = 14,885,944,609.77/140,456.78
  6. Step 6: Final answer
    x = 105,982.39

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.