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Finding the Fourth Proportional to 118,780.20, 163,910.34 and 65,062.44

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Solution

The fourth proportional to 118,780.20, 163,910.34 and 65,062.44 is: 89,782.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,780.20 : 163,910.34 = 65,062.44 : x
  2. Step 2: Convert to fraction form
    118,780.20/163,910.34 = 65,062.44/x
  3. Step 3: Cross multiply
    118,780.20x = 163,910.34 × 65,062.44
  4. Step 4: Simplify right side
    118,780.20x = 10,664,406,661.63
  5. Step 5: Solve for x
    x = 10,664,406,661.63/118,780.20
  6. Step 6: Final answer
    x = 89,782.70

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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.