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Finding the Fourth Proportional to 279,612.48, 419,421.44 and 79,931.48

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Solution

The fourth proportional to 279,612.48, 419,421.44 and 79,931.48 is: 119,898.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,612.48 : 419,421.44 = 79,931.48 : x
  2. Step 2: Convert to fraction form
    279,612.48/419,421.44 = 79,931.48/x
  3. Step 3: Cross multiply
    279,612.48x = 419,421.44 × 79,931.48
  4. Step 4: Simplify right side
    279,612.48x = 33,524,976,442.93
  5. Step 5: Solve for x
    x = 33,524,976,442.93/279,612.48
  6. Step 6: Final answer
    x = 119,898.00

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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.