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Finding the Third Proportional to 69,388 and 99,154

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Solution

The third proportional to 69,388 and 99,154 is: 141,688.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,388 : 99,154 = 99,154 : x
  2. Step 2: Convert to fraction form
    69,388/99,154 = 99,154/x
  3. Step 3: Cross multiply
    69,388x = 99,154 × 99,154
  4. Step 4: Simplify right side
    69,388x = 9,831,515,716
  5. Step 5: Solve for x
    x = 9,831,515,716/69,388
  6. Step 6: Final answer
    x = 141,688.99

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.