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Finding the Fourth Proportional to 72,604.89, 100,195.15 and 40,339.55

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Solution

The fourth proportional to 72,604.89, 100,195.15 and 40,339.55 is: 55,668.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,604.89 : 100,195.15 = 40,339.55 : x
  2. Step 2: Convert to fraction form
    72,604.89/100,195.15 = 40,339.55/x
  3. Step 3: Cross multiply
    72,604.89x = 100,195.15 × 40,339.55
  4. Step 4: Simplify right side
    72,604.89x = 4,041,827,412.82
  5. Step 5: Solve for x
    x = 4,041,827,412.82/72,604.89
  6. Step 6: Final answer
    x = 55,668.80

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1.5x scale

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.