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Finding the Fourth Proportional to 139,430.73, 192,415.58 and 75,768.57

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Solution

The fourth proportional to 139,430.73, 192,415.58 and 75,768.57 is: 104,561.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,430.73 : 192,415.58 = 75,768.57 : x
  2. Step 2: Convert to fraction form
    139,430.73/192,415.58 = 75,768.57/x
  3. Step 3: Cross multiply
    139,430.73x = 192,415.58 × 75,768.57
  4. Step 4: Simplify right side
    139,430.73x = 14,579,052,963.48
  5. Step 5: Solve for x
    x = 14,579,052,963.48/139,430.73
  6. Step 6: Final answer
    x = 104,561.26

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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.