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Finding the Fourth Proportional to 72,668.42, 108,901.13 and 35,218.55

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Solution

The fourth proportional to 72,668.42, 108,901.13 and 35,218.55 is: 52,778.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,668.42 : 108,901.13 = 35,218.55 : x
  2. Step 2: Convert to fraction form
    72,668.42/108,901.13 = 35,218.55/x
  3. Step 3: Cross multiply
    72,668.42x = 108,901.13 × 35,218.55
  4. Step 4: Simplify right side
    72,668.42x = 3,835,339,672.71
  5. Step 5: Solve for x
    x = 3,835,339,672.71/72,668.42
  6. Step 6: Final answer
    x = 52,778.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.