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Finding the Fourth Proportional to 279,019.76, 418,392.36 and 89,435.68

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Solution

The fourth proportional to 279,019.76, 418,392.36 and 89,435.68 is: 134,109.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,019.76 : 418,392.36 = 89,435.68 : x
  2. Step 2: Convert to fraction form
    279,019.76/418,392.36 = 89,435.68/x
  3. Step 3: Cross multiply
    279,019.76x = 418,392.36 × 89,435.68
  4. Step 4: Simplify right side
    279,019.76x = 37,419,205,223.40
  5. Step 5: Solve for x
    x = 37,419,205,223.40/279,019.76
  6. Step 6: Final answer
    x = 134,109.52

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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.