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Finding the Fourth Proportional to 147,859.20, 221,740.20 and 54,352.80

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Solution

The fourth proportional to 147,859.20, 221,740.20 and 54,352.80 is: 81,511.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,859.20 : 221,740.20 = 54,352.80 : x
  2. Step 2: Convert to fraction form
    147,859.20/221,740.20 = 54,352.80/x
  3. Step 3: Cross multiply
    147,859.20x = 221,740.20 × 54,352.80
  4. Step 4: Simplify right side
    147,859.20x = 12,052,200,742.56
  5. Step 5: Solve for x
    x = 12,052,200,742.56/147,859.20
  6. Step 6: Final answer
    x = 81,511.33

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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.