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Finding the Fourth Proportional to 72,628.97, 100,233.09 and 40,797.89

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Solution

The fourth proportional to 72,628.97, 100,233.09 and 40,797.89 is: 56,303.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,628.97 : 100,233.09 = 40,797.89 : x
  2. Step 2: Convert to fraction form
    72,628.97/100,233.09 = 40,797.89/x
  3. Step 3: Cross multiply
    72,628.97x = 100,233.09 × 40,797.89
  4. Step 4: Simplify right side
    72,628.97x = 4,089,298,830.76
  5. Step 5: Solve for x
    x = 4,089,298,830.76/72,628.97
  6. Step 6: Final answer
    x = 56,303.96

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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.