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Finding the Fourth Proportional to 279,145.56, 418,720.86 and 79,465.86

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Solution

The fourth proportional to 279,145.56, 418,720.86 and 79,465.86 is: 119,199.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,145.56 : 418,720.86 = 79,465.86 : x
  2. Step 2: Convert to fraction form
    279,145.56/418,720.86 = 79,465.86/x
  3. Step 3: Cross multiply
    279,145.56x = 418,720.86 × 79,465.86
  4. Step 4: Simplify right side
    279,145.56x = 33,274,013,239.84
  5. Step 5: Solve for x
    x = 33,274,013,239.84/279,145.56
  6. Step 6: Final answer
    x = 119,199.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.