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Finding the Fourth Proportional to 139,238.60, 192,148.62 and 75,575.84

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Solution

The fourth proportional to 139,238.60, 192,148.62 and 75,575.84 is: 104,294.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,238.60 : 192,148.62 = 75,575.84 : x
  2. Step 2: Convert to fraction form
    139,238.60/192,148.62 = 75,575.84/x
  3. Step 3: Cross multiply
    139,238.60x = 192,148.62 × 75,575.84
  4. Step 4: Simplify right side
    139,238.60x = 14,521,793,361.34
  5. Step 5: Solve for x
    x = 14,521,793,361.34/139,238.60
  6. Step 6: Final answer
    x = 104,294.31

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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.