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Finding the Fourth Proportional to 245,135.64, 367,749.81 and 85,205.55

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Solution

The fourth proportional to 245,135.64, 367,749.81 and 85,205.55 is: 127,824.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,135.64 : 367,749.81 = 85,205.55 : x
  2. Step 2: Convert to fraction form
    245,135.64/367,749.81 = 85,205.55/x
  3. Step 3: Cross multiply
    245,135.64x = 367,749.81 × 85,205.55
  4. Step 4: Simplify right side
    245,135.64x = 31,334,324,823.45
  5. Step 5: Solve for x
    x = 31,334,324,823.45/245,135.64
  6. Step 6: Final answer
    x = 127,824.44

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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.