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Finding the Fourth Proportional to 57,078.81, 78,763.36 and 38,644.41

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Solution

The fourth proportional to 57,078.81, 78,763.36 and 38,644.41 is: 53,325.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,078.81 : 78,763.36 = 38,644.41 : x
  2. Step 2: Convert to fraction form
    57,078.81/78,763.36 = 38,644.41/x
  3. Step 3: Cross multiply
    57,078.81x = 78,763.36 × 38,644.41
  4. Step 4: Simplify right side
    57,078.81x = 3,043,763,576.82
  5. Step 5: Solve for x
    x = 3,043,763,576.82/57,078.81
  6. Step 6: Final answer
    x = 53,325.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.