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Finding the Fourth Proportional to 121,391.40, 182,022.30 and 51,191.40

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Solution

The fourth proportional to 121,391.40, 182,022.30 and 51,191.40 is: 76,759.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,391.40 : 182,022.30 = 51,191.40 : x
  2. Step 2: Convert to fraction form
    121,391.40/182,022.30 = 51,191.40/x
  3. Step 3: Cross multiply
    121,391.40x = 182,022.30 × 51,191.40
  4. Step 4: Simplify right side
    121,391.40x = 9,317,976,368.22
  5. Step 5: Solve for x
    x = 9,317,976,368.22/121,391.40
  6. Step 6: Final answer
    x = 76,759.77

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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.