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Finding the Fourth Proportional to 221,477.60, 331,989.60 and 108,984.80

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Solution

The fourth proportional to 221,477.60, 331,989.60 and 108,984.80 is: 163,365.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,477.60 : 331,989.60 = 108,984.80 : x
  2. Step 2: Convert to fraction form
    221,477.60/331,989.60 = 108,984.80/x
  3. Step 3: Cross multiply
    221,477.60x = 331,989.60 × 108,984.80
  4. Step 4: Simplify right side
    221,477.60x = 36,181,820,158.08
  5. Step 5: Solve for x
    x = 36,181,820,158.08/221,477.60
  6. Step 6: Final answer
    x = 163,365.60

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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.