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Finding the Fourth Proportional to 139,680.60, 192,755.53 and 76,017.03

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Solution

The fourth proportional to 139,680.60, 192,755.53 and 76,017.03 is: 104,901.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,680.60 : 192,755.53 = 76,017.03 : x
  2. Step 2: Convert to fraction form
    139,680.60/192,755.53 = 76,017.03/x
  3. Step 3: Cross multiply
    139,680.60x = 192,755.53 × 76,017.03
  4. Step 4: Simplify right side
    139,680.60x = 14,652,701,562.81
  5. Step 5: Solve for x
    x = 14,652,701,562.81/139,680.60
  6. Step 6: Final answer
    x = 104,901.48

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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.