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Finding the Fourth Proportional to 163,072.80, 244,378.80 and 120,621.60

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Solution

The fourth proportional to 163,072.80, 244,378.80 and 120,621.60 is: 180,761.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,072.80 : 244,378.80 = 120,621.60 : x
  2. Step 2: Convert to fraction form
    163,072.80/244,378.80 = 120,621.60/x
  3. Step 3: Cross multiply
    163,072.80x = 244,378.80 × 120,621.60
  4. Step 4: Simplify right side
    163,072.80x = 29,477,361,862.08
  5. Step 5: Solve for x
    x = 29,477,361,862.08/163,072.80
  6. Step 6: Final answer
    x = 180,761.98

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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.