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Finding the Fourth Proportional to 139,126.52, 191,994.93 and 75,464.32

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Solution

The fourth proportional to 139,126.52, 191,994.93 and 75,464.32 is: 104,140.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,126.52 : 191,994.93 = 75,464.32 : x
  2. Step 2: Convert to fraction form
    139,126.52/191,994.93 = 75,464.32/x
  3. Step 3: Cross multiply
    139,126.52x = 191,994.93 × 75,464.32
  4. Step 4: Simplify right side
    139,126.52x = 14,488,766,835.90
  5. Step 5: Solve for x
    x = 14,488,766,835.90/139,126.52
  6. Step 6: Final answer
    x = 104,140.94

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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.