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Finding the Fourth Proportional to 279,595.80, 419,351.76 and 90,031.08

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Solution

The fourth proportional to 279,595.80, 419,351.76 and 90,031.08 is: 135,033.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,595.80 : 419,351.76 = 90,031.08 : x
  2. Step 2: Convert to fraction form
    279,595.80/419,351.76 = 90,031.08/x
  3. Step 3: Cross multiply
    279,595.80x = 419,351.76 × 90,031.08
  4. Step 4: Simplify right side
    279,595.80x = 37,754,691,852.70
  5. Step 5: Solve for x
    x = 37,754,691,852.70/279,595.80
  6. Step 6: Final answer
    x = 135,033.12

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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.