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Finding the Fourth Proportional to 139,232.80, 192,141.42 and 75,570.60

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Solution

The fourth proportional to 139,232.80, 192,141.42 and 75,570.60 is: 104,287.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,232.80 : 192,141.42 = 75,570.60 : x
  2. Step 2: Convert to fraction form
    139,232.80/192,141.42 = 75,570.60/x
  3. Step 3: Cross multiply
    139,232.80x = 192,141.42 × 75,570.60
  4. Step 4: Simplify right side
    139,232.80x = 14,520,242,394.25
  5. Step 5: Solve for x
    x = 14,520,242,394.25/139,232.80
  6. Step 6: Final answer
    x = 104,287.51

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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.