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Finding the Fourth Proportional to 140,347.62, 193,662.90 and 79,918.38

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Solution

The fourth proportional to 140,347.62, 193,662.90 and 79,918.38 is: 110,277.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,347.62 : 193,662.90 = 79,918.38 : x
  2. Step 2: Convert to fraction form
    140,347.62/193,662.90 = 79,918.38/x
  3. Step 3: Cross multiply
    140,347.62x = 193,662.90 × 79,918.38
  4. Step 4: Simplify right side
    140,347.62x = 15,477,225,234.10
  5. Step 5: Solve for x
    x = 15,477,225,234.10/140,347.62
  6. Step 6: Final answer
    x = 110,277.79

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1.5x scale

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.