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Finding the Fourth Proportional to 193,360.80, 289,810.80 and 81,040.80

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Solution

The fourth proportional to 193,360.80, 289,810.80 and 81,040.80 is: 121,464.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,360.80 : 289,810.80 = 81,040.80 : x
  2. Step 2: Convert to fraction form
    193,360.80/289,810.80 = 81,040.80/x
  3. Step 3: Cross multiply
    193,360.80x = 289,810.80 × 81,040.80
  4. Step 4: Simplify right side
    193,360.80x = 23,486,499,080.64
  5. Step 5: Solve for x
    x = 23,486,499,080.64/193,360.80
  6. Step 6: Final answer
    x = 121,464.64

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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.