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Finding the Fourth Proportional to 139,069.01, 191,914.43 and 75,405.44

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Solution

The fourth proportional to 139,069.01, 191,914.43 and 75,405.44 is: 104,059.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,069.01 : 191,914.43 = 75,405.44 : x
  2. Step 2: Convert to fraction form
    139,069.01/191,914.43 = 75,405.44/x
  3. Step 3: Cross multiply
    139,069.01x = 191,914.43 × 75,405.44
  4. Step 4: Simplify right side
    139,069.01x = 14,471,390,699.90
  5. Step 5: Solve for x
    x = 14,471,390,699.90/139,069.01
  6. Step 6: Final answer
    x = 104,059.07

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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.