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Finding the Fourth Proportional to 139,217, 192,119.60 and 75,554.80

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Solution

The fourth proportional to 139,217, 192,119.60 and 75,554.80 is: 104,265.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,217 : 192,119.60 = 75,554.80 : x
  2. Step 2: Convert to fraction form
    139,217/192,119.60 = 75,554.80/x
  3. Step 3: Cross multiply
    139,217x = 192,119.60 × 75,554.80
  4. Step 4: Simplify right side
    139,217x = 14,515,557,954.08
  5. Step 5: Solve for x
    x = 14,515,557,954.08/139,217
  6. Step 6: Final answer
    x = 104,265.70

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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.