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Finding the Fourth Proportional to 139,483.14, 192,485.05 and 75,819.57

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Solution

The fourth proportional to 139,483.14, 192,485.05 and 75,819.57 is: 104,630.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,483.14 : 192,485.05 = 75,819.57 : x
  2. Step 2: Convert to fraction form
    139,483.14/192,485.05 = 75,819.57/x
  3. Step 3: Cross multiply
    139,483.14x = 192,485.05 × 75,819.57
  4. Step 4: Simplify right side
    139,483.14x = 14,594,133,722.43
  5. Step 5: Solve for x
    x = 14,594,133,722.43/139,483.14
  6. Step 6: Final answer
    x = 104,630.09

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1.5x scale

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.