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Finding the Fourth Proportional to 72,566.46, 100,143.29 and 40,735.29

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Solution

The fourth proportional to 72,566.46, 100,143.29 and 40,735.29 is: 56,215.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,566.46 : 100,143.29 = 40,735.29 : x
  2. Step 2: Convert to fraction form
    72,566.46/100,143.29 = 40,735.29/x
  3. Step 3: Cross multiply
    72,566.46x = 100,143.29 × 40,735.29
  4. Step 4: Simplify right side
    72,566.46x = 4,079,365,756.03
  5. Step 5: Solve for x
    x = 4,079,365,756.03/72,566.46
  6. Step 6: Final answer
    x = 56,215.58

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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.