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Finding the Fourth Proportional to 78,730.97, 108,650.79 and 48,536.24

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Solution

The fourth proportional to 78,730.97, 108,650.79 and 48,536.24 is: 66,981.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,730.97 : 108,650.79 = 48,536.24 : x
  2. Step 2: Convert to fraction form
    78,730.97/108,650.79 = 48,536.24/x
  3. Step 3: Cross multiply
    78,730.97x = 108,650.79 × 48,536.24
  4. Step 4: Simplify right side
    78,730.97x = 5,273,500,819.63
  5. Step 5: Solve for x
    x = 5,273,500,819.63/78,730.97
  6. Step 6: Final answer
    x = 66,981.28

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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.