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Finding the Fourth Proportional to 72,571.19, 100,141.40 and 40,733.87

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Solution

The fourth proportional to 72,571.19, 100,141.40 and 40,733.87 is: 56,208.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,571.19 : 100,141.40 = 40,733.87 : x
  2. Step 2: Convert to fraction form
    72,571.19/100,141.40 = 40,733.87/x
  3. Step 3: Cross multiply
    72,571.19x = 100,141.40 × 40,733.87
  4. Step 4: Simplify right side
    72,571.19x = 4,079,146,565.55
  5. Step 5: Solve for x
    x = 4,079,146,565.55/72,571.19
  6. Step 6: Final answer
    x = 56,208.90

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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.