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Finding the Fourth Proportional to 60,138.94, 90,228.45 and 20,161.87

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Solution

The fourth proportional to 60,138.94, 90,228.45 and 20,161.87 is: 30,249.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,138.94 : 90,228.45 = 20,161.87 : x
  2. Step 2: Convert to fraction form
    60,138.94/90,228.45 = 20,161.87/x
  3. Step 3: Cross multiply
    60,138.94x = 90,228.45 × 20,161.87
  4. Step 4: Simplify right side
    60,138.94x = 1,819,174,429.17
  5. Step 5: Solve for x
    x = 1,819,174,429.17/60,138.94
  6. Step 6: Final answer
    x = 30,249.53

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1.5x scale

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.