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Finding the Fourth Proportional to 139,398.03, 192,370.14 and 75,735.81

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Solution

The fourth proportional to 139,398.03, 192,370.14 and 75,735.81 is: 104,515.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,398.03 : 192,370.14 = 75,735.81 : x
  2. Step 2: Convert to fraction form
    139,398.03/192,370.14 = 75,735.81/x
  3. Step 3: Cross multiply
    139,398.03x = 192,370.14 × 75,735.81
  4. Step 4: Simplify right side
    139,398.03x = 14,569,308,372.71
  5. Step 5: Solve for x
    x = 14,569,308,372.71/139,398.03
  6. Step 6: Final answer
    x = 104,515.88

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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.