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Finding the Fourth Proportional to 78,462.52, 117,745.62 and 36,912.76

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Solution

The fourth proportional to 78,462.52, 117,745.62 and 36,912.76 is: 55,393.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,462.52 : 117,745.62 = 36,912.76 : x
  2. Step 2: Convert to fraction form
    78,462.52/117,745.62 = 36,912.76/x
  3. Step 3: Cross multiply
    78,462.52x = 117,745.62 × 36,912.76
  4. Step 4: Simplify right side
    78,462.52x = 4,346,315,812.11
  5. Step 5: Solve for x
    x = 4,346,315,812.11/78,462.52
  6. Step 6: Final answer
    x = 55,393.53

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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.