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Finding the Fourth Proportional to 140,428.86, 193,777.20 and 79,986.89

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Solution

The fourth proportional to 140,428.86, 193,777.20 and 79,986.89 is: 110,373.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,428.86 : 193,777.20 = 79,986.89 : x
  2. Step 2: Convert to fraction form
    140,428.86/193,777.20 = 79,986.89/x
  3. Step 3: Cross multiply
    140,428.86x = 193,777.20 × 79,986.89
  4. Step 4: Simplify right side
    140,428.86x = 15,499,634,612.02
  5. Step 5: Solve for x
    x = 15,499,634,612.02/140,428.86
  6. Step 6: Final answer
    x = 110,373.57

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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.