Home / 154,279.68-212,899.20-90,624

Finding the Fourth Proportional to 154,279.68, 212,899.20 and 90,624

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Solution

The fourth proportional to 154,279.68, 212,899.20 and 90,624 is: 125,057.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,279.68 : 212,899.20 = 90,624 : x
  2. Step 2: Convert to fraction form
    154,279.68/212,899.20 = 90,624/x
  3. Step 3: Cross multiply
    154,279.68x = 212,899.20 × 90,624
  4. Step 4: Simplify right side
    154,279.68x = 19,293,777,100.80
  5. Step 5: Solve for x
    x = 19,293,777,100.80/154,279.68
  6. Step 6: Final answer
    x = 125,057.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.