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Finding the Third Proportional to 139,428 and 221,596

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Solution

The third proportional to 139,428 and 221,596 is: 352,187.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,428 : 221,596 = 221,596 : x
  2. Step 2: Convert to fraction form
    139,428/221,596 = 221,596/x
  3. Step 3: Cross multiply
    139,428x = 221,596 × 221,596
  4. Step 4: Simplify right side
    139,428x = 49,104,787,216
  5. Step 5: Solve for x
    x = 49,104,787,216/139,428
  6. Step 6: Final answer
    x = 352,187.42

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.