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Finding the Fourth Proportional to 140,433.78, 193,751.28 and 79,961.64

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Solution

The fourth proportional to 140,433.78, 193,751.28 and 79,961.64 is: 110,320.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,433.78 : 193,751.28 = 79,961.64 : x
  2. Step 2: Convert to fraction form
    140,433.78/193,751.28 = 79,961.64/x
  3. Step 3: Cross multiply
    140,433.78x = 193,751.28 × 79,961.64
  4. Step 4: Simplify right side
    140,433.78x = 15,492,670,100.90
  5. Step 5: Solve for x
    x = 15,492,670,100.90/140,433.78
  6. Step 6: Final answer
    x = 110,320.11

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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.