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Finding the Fourth Proportional to 139,112.64, 191,975.04 and 75,449.52

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Solution

The fourth proportional to 139,112.64, 191,975.04 and 75,449.52 is: 104,120.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,112.64 : 191,975.04 = 75,449.52 : x
  2. Step 2: Convert to fraction form
    139,112.64/191,975.04 = 75,449.52/x
  3. Step 3: Cross multiply
    139,112.64x = 191,975.04 × 75,449.52
  4. Step 4: Simplify right side
    139,112.64x = 14,484,424,619.98
  5. Step 5: Solve for x
    x = 14,484,424,619.98/139,112.64
  6. Step 6: Final answer
    x = 104,120.12

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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.