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Finding the Fourth Proportional to 72,323.66, 99,817.13 and 40,494.61

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Solution

The fourth proportional to 72,323.66, 99,817.13 and 40,494.61 is: 55,888.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,323.66 : 99,817.13 = 40,494.61 : x
  2. Step 2: Convert to fraction form
    72,323.66/99,817.13 = 40,494.61/x
  3. Step 3: Cross multiply
    72,323.66x = 99,817.13 × 40,494.61
  4. Step 4: Simplify right side
    72,323.66x = 4,042,055,750.67
  5. Step 5: Solve for x
    x = 4,042,055,750.67/72,323.66
  6. Step 6: Final answer
    x = 55,888.43

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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.