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Finding the Fourth Proportional to 104,643.82, 156,886.69 and 53,988.58

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Solution

The fourth proportional to 104,643.82, 156,886.69 and 53,988.58 is: 80,942.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,643.82 : 156,886.69 = 53,988.58 : x
  2. Step 2: Convert to fraction form
    104,643.82/156,886.69 = 53,988.58/x
  3. Step 3: Cross multiply
    104,643.82x = 156,886.69 × 53,988.58
  4. Step 4: Simplify right side
    104,643.82x = 8,470,089,344.06
  5. Step 5: Solve for x
    x = 8,470,089,344.06/104,643.82
  6. Step 6: Final answer
    x = 80,942.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.