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Finding the Fourth Proportional to 139,290.36, 192,221.70 and 75,628.20

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Solution

The fourth proportional to 139,290.36, 192,221.70 and 75,628.20 is: 104,367.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,290.36 : 192,221.70 = 75,628.20 : x
  2. Step 2: Convert to fraction form
    139,290.36/192,221.70 = 75,628.20/x
  3. Step 3: Cross multiply
    139,290.36x = 192,221.70 × 75,628.20
  4. Step 4: Simplify right side
    139,290.36x = 14,537,381,171.94
  5. Step 5: Solve for x
    x = 14,537,381,171.94/139,290.36
  6. Step 6: Final answer
    x = 104,367.46

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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.