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Finding the Fourth Proportional to 139,678.60, 192,752.77 and 76,015.03

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Solution

The fourth proportional to 139,678.60, 192,752.77 and 76,015.03 is: 104,898.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,678.60 : 192,752.77 = 76,015.03 : x
  2. Step 2: Convert to fraction form
    139,678.60/192,752.77 = 76,015.03/x
  3. Step 3: Cross multiply
    139,678.60x = 192,752.77 × 76,015.03
  4. Step 4: Simplify right side
    139,678.60x = 14,652,107,594.13
  5. Step 5: Solve for x
    x = 14,652,107,594.13/139,678.60
  6. Step 6: Final answer
    x = 104,898.73

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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.