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Finding the Fourth Proportional to 138,069.68, 190,600.36 and 104,091.98

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Solution

The fourth proportional to 138,069.68, 190,600.36 and 104,091.98 is: 143,695.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,069.68 : 190,600.36 = 104,091.98 : x
  2. Step 2: Convert to fraction form
    138,069.68/190,600.36 = 104,091.98/x
  3. Step 3: Cross multiply
    138,069.68x = 190,600.36 × 104,091.98
  4. Step 4: Simplify right side
    138,069.68x = 19,839,968,861.11
  5. Step 5: Solve for x
    x = 19,839,968,861.11/138,069.68
  6. Step 6: Final answer
    x = 143,695.33

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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.