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Finding the Fourth Proportional to 60,228.21, 90,356.67 and 20,785.67

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Solution

The fourth proportional to 60,228.21, 90,356.67 and 20,785.67 is: 31,183.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,228.21 : 90,356.67 = 20,785.67 : x
  2. Step 2: Convert to fraction form
    60,228.21/90,356.67 = 20,785.67/x
  3. Step 3: Cross multiply
    60,228.21x = 90,356.67 × 20,785.67
  4. Step 4: Simplify right side
    60,228.21x = 1,878,123,473.14
  5. Step 5: Solve for x
    x = 1,878,123,473.14/60,228.21
  6. Step 6: Final answer
    x = 31,183.45

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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.