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Finding the Fourth Proportional to 139,530.84, 192,551.56 and 75,868.68

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Solution

The fourth proportional to 139,530.84, 192,551.56 and 75,868.68 is: 104,698.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,530.84 : 192,551.56 = 75,868.68 : x
  2. Step 2: Convert to fraction form
    139,530.84/192,551.56 = 75,868.68/x
  3. Step 3: Cross multiply
    139,530.84x = 192,551.56 × 75,868.68
  4. Step 4: Simplify right side
    139,530.84x = 14,608,632,689.14
  5. Step 5: Solve for x
    x = 14,608,632,689.14/139,530.84
  6. Step 6: Final answer
    x = 104,698.24

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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.