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Finding the Fourth Proportional to 118,755.21, 163,886.14 and 65,043.20

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Solution

The fourth proportional to 118,755.21, 163,886.14 and 65,043.20 is: 89,761.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,755.21 : 163,886.14 = 65,043.20 : x
  2. Step 2: Convert to fraction form
    118,755.21/163,886.14 = 65,043.20/x
  3. Step 3: Cross multiply
    118,755.21x = 163,886.14 × 65,043.20
  4. Step 4: Simplify right side
    118,755.21x = 10,659,679,106.40
  5. Step 5: Solve for x
    x = 10,659,679,106.40/118,755.21
  6. Step 6: Final answer
    x = 89,761.78

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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.