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Finding the Fourth Proportional to 72,664.77, 100,286.76 and 40,833.66

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Solution

The fourth proportional to 72,664.77, 100,286.76 and 40,833.66 is: 56,355.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,664.77 : 100,286.76 = 40,833.66 : x
  2. Step 2: Convert to fraction form
    72,664.77/100,286.76 = 40,833.66/x
  3. Step 3: Cross multiply
    72,664.77x = 100,286.76 × 40,833.66
  4. Step 4: Simplify right side
    72,664.77x = 4,095,075,460.34
  5. Step 5: Solve for x
    x = 4,095,075,460.34/72,664.77
  6. Step 6: Final answer
    x = 56,355.72

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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.