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Finding the Fourth Proportional to 67,235.20, 100,852.80 and 30,371.20

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Solution

The fourth proportional to 67,235.20, 100,852.80 and 30,371.20 is: 45,556.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,235.20 : 100,852.80 = 30,371.20 : x
  2. Step 2: Convert to fraction form
    67,235.20/100,852.80 = 30,371.20/x
  3. Step 3: Cross multiply
    67,235.20x = 100,852.80 × 30,371.20
  4. Step 4: Simplify right side
    67,235.20x = 3,063,020,559.36
  5. Step 5: Solve for x
    x = 3,063,020,559.36/67,235.20
  6. Step 6: Final answer
    x = 45,556.80

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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.