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Finding the Fourth Proportional to 139,668.30, 192,838.68 and 130,745.34

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Solution

The fourth proportional to 139,668.30, 192,838.68 and 130,745.34 is: 180,518.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,668.30 : 192,838.68 = 130,745.34 : x
  2. Step 2: Convert to fraction form
    139,668.30/192,838.68 = 130,745.34/x
  3. Step 3: Cross multiply
    139,668.30x = 192,838.68 × 130,745.34
  4. Step 4: Simplify right side
    139,668.30x = 25,212,758,781.75
  5. Step 5: Solve for x
    x = 25,212,758,781.75/139,668.30
  6. Step 6: Final answer
    x = 180,518.83

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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.