Home / 279,421.68-419,214.18-89,877.78

Finding the Fourth Proportional to 279,421.68, 419,214.18 and 89,877.78

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Solution

The fourth proportional to 279,421.68, 419,214.18 and 89,877.78 is: 134,842.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,421.68 : 419,214.18 = 89,877.78 : x
  2. Step 2: Convert to fraction form
    279,421.68/419,214.18 = 89,877.78/x
  3. Step 3: Cross multiply
    279,421.68x = 419,214.18 × 89,877.78
  4. Step 4: Simplify right side
    279,421.68x = 37,678,039,842.92
  5. Step 5: Solve for x
    x = 37,678,039,842.92/279,421.68
  6. Step 6: Final answer
    x = 134,842.94

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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.