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Finding the Fourth Proportional to 118,708.20, 163,819.20 and 64,992.28

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Solution

The fourth proportional to 118,708.20, 163,819.20 and 64,992.28 is: 89,690.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,708.20 : 163,819.20 = 64,992.28 : x
  2. Step 2: Convert to fraction form
    118,708.20/163,819.20 = 64,992.28/x
  3. Step 3: Cross multiply
    118,708.20x = 163,819.20 × 64,992.28
  4. Step 4: Simplify right side
    118,708.20x = 10,646,983,315.78
  5. Step 5: Solve for x
    x = 10,646,983,315.78/118,708.20
  6. Step 6: Final answer
    x = 89,690.38

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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.