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Finding the Fourth Proportional to 139,051.04, 191,889.60 and 75,388.64

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Solution

The fourth proportional to 139,051.04, 191,889.60 and 75,388.64 is: 104,035.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,051.04 : 191,889.60 = 75,388.64 : x
  2. Step 2: Convert to fraction form
    139,051.04/191,889.60 = 75,388.64/x
  3. Step 3: Cross multiply
    139,051.04x = 191,889.60 × 75,388.64
  4. Step 4: Simplify right side
    139,051.04x = 14,466,295,974.14
  5. Step 5: Solve for x
    x = 14,466,295,974.14/139,051.04
  6. Step 6: Final answer
    x = 104,035.87

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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.