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Finding the Fourth Proportional to 183,729.80, 274,980.30 and 128,433.80

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Solution

The fourth proportional to 183,729.80, 274,980.30 and 128,433.80 is: 192,221.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    183,729.80 : 274,980.30 = 128,433.80 : x
  2. Step 2: Convert to fraction form
    183,729.80/274,980.30 = 128,433.80/x
  3. Step 3: Cross multiply
    183,729.80x = 274,980.30 × 128,433.80
  4. Step 4: Simplify right side
    183,729.80x = 35,316,764,854.14
  5. Step 5: Solve for x
    x = 35,316,764,854.14/183,729.80
  6. Step 6: Final answer
    x = 192,221.21

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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.