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Finding the Fourth Proportional to 118,765.50, 163,891.59 and 71,045.22

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Solution

The fourth proportional to 118,765.50, 163,891.59 and 71,045.22 is: 98,039.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,765.50 : 163,891.59 = 71,045.22 : x
  2. Step 2: Convert to fraction form
    118,765.50/163,891.59 = 71,045.22/x
  3. Step 3: Cross multiply
    118,765.50x = 163,891.59 × 71,045.22
  4. Step 4: Simplify right side
    118,765.50x = 11,643,714,067.70
  5. Step 5: Solve for x
    x = 11,643,714,067.70/118,765.50
  6. Step 6: Final answer
    x = 98,039.53

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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.