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Finding the Fourth Proportional to 72,753.72, 100,391.97 and 40,921.93

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Solution

The fourth proportional to 72,753.72, 100,391.97 and 40,921.93 is: 56,467.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,753.72 : 100,391.97 = 40,921.93 : x
  2. Step 2: Convert to fraction form
    72,753.72/100,391.97 = 40,921.93/x
  3. Step 3: Cross multiply
    72,753.72x = 100,391.97 × 40,921.93
  4. Step 4: Simplify right side
    72,753.72x = 4,108,233,168.90
  5. Step 5: Solve for x
    x = 4,108,233,168.90/72,753.72
  6. Step 6: Final answer
    x = 56,467.67

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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.