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Finding the Fourth Proportional to 139,412.21, 192,390.59 and 75,751.07

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Solution

The fourth proportional to 139,412.21, 192,390.59 and 75,751.07 is: 104,537.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,412.21 : 192,390.59 = 75,751.07 : x
  2. Step 2: Convert to fraction form
    139,412.21/192,390.59 = 75,751.07/x
  3. Step 3: Cross multiply
    139,412.21x = 192,390.59 × 75,751.07
  4. Step 4: Simplify right side
    139,412.21x = 14,573,792,277.86
  5. Step 5: Solve for x
    x = 14,573,792,277.86/139,412.21
  6. Step 6: Final answer
    x = 104,537.42

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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.