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Finding the Fourth Proportional to 72,599.65, 100,188.69 and 40,336.33

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Solution

The fourth proportional to 72,599.65, 100,188.69 and 40,336.33 is: 55,664.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,599.65 : 100,188.69 = 40,336.33 : x
  2. Step 2: Convert to fraction form
    72,599.65/100,188.69 = 40,336.33/x
  3. Step 3: Cross multiply
    72,599.65x = 100,188.69 × 40,336.33
  4. Step 4: Simplify right side
    72,599.65x = 4,041,244,062.11
  5. Step 5: Solve for x
    x = 4,041,244,062.11/72,599.65
  6. Step 6: Final answer
    x = 55,664.79

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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.