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Finding the Fourth Proportional to 109,903.20, 164,822.40 and 43,321.20

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Solution

The fourth proportional to 109,903.20, 164,822.40 and 43,321.20 is: 64,969.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,903.20 : 164,822.40 = 43,321.20 : x
  2. Step 2: Convert to fraction form
    109,903.20/164,822.40 = 43,321.20/x
  3. Step 3: Cross multiply
    109,903.20x = 164,822.40 × 43,321.20
  4. Step 4: Simplify right side
    109,903.20x = 7,140,304,154.88
  5. Step 5: Solve for x
    x = 7,140,304,154.88/109,903.20
  6. Step 6: Final answer
    x = 64,969.03

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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.