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Finding the Fourth Proportional to 60,944.70, 91,380.60 and 31,420.20

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Solution

The fourth proportional to 60,944.70, 91,380.60 and 31,420.20 is: 47,111.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,944.70 : 91,380.60 = 31,420.20 : x
  2. Step 2: Convert to fraction form
    60,944.70/91,380.60 = 31,420.20/x
  3. Step 3: Cross multiply
    60,944.70x = 91,380.60 × 31,420.20
  4. Step 4: Simplify right side
    60,944.70x = 2,871,196,728.12
  5. Step 5: Solve for x
    x = 2,871,196,728.12/60,944.70
  6. Step 6: Final answer
    x = 47,111.51

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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.