Home / 30,112.53-45,138.72-20,125.69

Finding the Fourth Proportional to 30,112.53, 45,138.72 and 20,125.69

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Solution

The fourth proportional to 30,112.53, 45,138.72 and 20,125.69 is: 30,168.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,112.53 : 45,138.72 = 20,125.69 : x
  2. Step 2: Convert to fraction form
    30,112.53/45,138.72 = 20,125.69/x
  3. Step 3: Cross multiply
    30,112.53x = 45,138.72 × 20,125.69
  4. Step 4: Simplify right side
    30,112.53x = 908,447,862.09
  5. Step 5: Solve for x
    x = 908,447,862.09/30,112.53
  6. Step 6: Final answer
    x = 30,168.43

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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.