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Finding the Fourth Proportional to 118,791.61, 163,933.40 and 65,081.63

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Solution

The fourth proportional to 118,791.61, 163,933.40 and 65,081.63 is: 89,813.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,791.61 : 163,933.40 = 65,081.63 : x
  2. Step 2: Convert to fraction form
    118,791.61/163,933.40 = 65,081.63/x
  3. Step 3: Cross multiply
    118,791.61x = 163,933.40 × 65,081.63
  4. Step 4: Simplify right side
    118,791.61x = 10,669,053,455.98
  5. Step 5: Solve for x
    x = 10,669,053,455.98/118,791.61
  6. Step 6: Final answer
    x = 89,813.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.