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Finding the Fourth Proportional to 140,197.66, 193,455.75 and 79,775.98

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Solution

The fourth proportional to 140,197.66, 193,455.75 and 79,775.98 is: 110,081.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,197.66 : 193,455.75 = 79,775.98 : x
  2. Step 2: Convert to fraction form
    140,197.66/193,455.75 = 79,775.98/x
  3. Step 3: Cross multiply
    140,197.66x = 193,455.75 × 79,775.98
  4. Step 4: Simplify right side
    140,197.66x = 15,433,122,042.89
  5. Step 5: Solve for x
    x = 15,433,122,042.89/140,197.66
  6. Step 6: Final answer
    x = 110,081.17

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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.