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Finding the Fourth Proportional to 72,228.56, 99,679.37 and 40,396.77

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Solution

The fourth proportional to 72,228.56, 99,679.37 and 40,396.77 is: 55,749.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,228.56 : 99,679.37 = 40,396.77 : x
  2. Step 2: Convert to fraction form
    72,228.56/99,679.37 = 40,396.77/x
  3. Step 3: Cross multiply
    72,228.56x = 99,679.37 × 40,396.77
  4. Step 4: Simplify right side
    72,228.56x = 4,026,724,381.65
  5. Step 5: Solve for x
    x = 4,026,724,381.65/72,228.56
  6. Step 6: Final answer
    x = 55,749.76

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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.