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Finding the Fourth Proportional to 141,698.66, 212,622.11 and 91,765.81

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Solution

The fourth proportional to 141,698.66, 212,622.11 and 91,765.81 is: 137,696.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,698.66 : 212,622.11 = 91,765.81 : x
  2. Step 2: Convert to fraction form
    141,698.66/212,622.11 = 91,765.81/x
  3. Step 3: Cross multiply
    141,698.66x = 212,622.11 × 91,765.81
  4. Step 4: Simplify right side
    141,698.66x = 19,511,438,626.12
  5. Step 5: Solve for x
    x = 19,511,438,626.12/141,698.66
  6. Step 6: Final answer
    x = 137,696.71

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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.