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Finding the Fourth Proportional to 74,134.20, 111,201.30 and 65,969.40

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Solution

The fourth proportional to 74,134.20, 111,201.30 and 65,969.40 is: 98,954.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,134.20 : 111,201.30 = 65,969.40 : x
  2. Step 2: Convert to fraction form
    74,134.20/111,201.30 = 65,969.40/x
  3. Step 3: Cross multiply
    74,134.20x = 111,201.30 × 65,969.40
  4. Step 4: Simplify right side
    74,134.20x = 7,335,883,040.22
  5. Step 5: Solve for x
    x = 7,335,883,040.22/74,134.20
  6. Step 6: Final answer
    x = 98,954.10

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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.