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Finding the Fourth Proportional to 84,557.70, 126,839.64 and 28,399.67

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Solution

The fourth proportional to 84,557.70, 126,839.64 and 28,399.67 is: 42,600.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,557.70 : 126,839.64 = 28,399.67 : x
  2. Step 2: Convert to fraction form
    84,557.70/126,839.64 = 28,399.67/x
  3. Step 3: Cross multiply
    84,557.70x = 126,839.64 × 28,399.67
  4. Step 4: Simplify right side
    84,557.70x = 3,602,203,284.72
  5. Step 5: Solve for x
    x = 3,602,203,284.72/84,557.70
  6. Step 6: Final answer
    x = 42,600.54

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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.