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Finding the Fourth Proportional to 108,519.52, 149,602.80 and 79,788.46

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Solution

The fourth proportional to 108,519.52, 149,602.80 and 79,788.46 is: 109,994.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,519.52 : 149,602.80 = 79,788.46 : x
  2. Step 2: Convert to fraction form
    108,519.52/149,602.80 = 79,788.46/x
  3. Step 3: Cross multiply
    108,519.52x = 149,602.80 × 79,788.46
  4. Step 4: Simplify right side
    108,519.52x = 11,936,577,023.69
  5. Step 5: Solve for x
    x = 11,936,577,023.69/108,519.52
  6. Step 6: Final answer
    x = 109,994.75

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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.