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Finding the Fourth Proportional to 113,361.70, 169,639.35 and 98,731.30

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Solution

The fourth proportional to 113,361.70, 169,639.35 and 98,731.30 is: 147,745.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,361.70 : 169,639.35 = 98,731.30 : x
  2. Step 2: Convert to fraction form
    113,361.70/169,639.35 = 98,731.30/x
  3. Step 3: Cross multiply
    113,361.70x = 169,639.35 × 98,731.30
  4. Step 4: Simplify right side
    113,361.70x = 16,748,713,556.66
  5. Step 5: Solve for x
    x = 16,748,713,556.66/113,361.70
  6. Step 6: Final answer
    x = 147,745.79

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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.