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Finding the Third Proportional to 84,432 and 130,728

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Solution

The third proportional to 84,432 and 130,728 is: 202,409.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,432 : 130,728 = 130,728 : x
  2. Step 2: Convert to fraction form
    84,432/130,728 = 130,728/x
  3. Step 3: Cross multiply
    84,432x = 130,728 × 130,728
  4. Step 4: Simplify right side
    84,432x = 17,089,809,984
  5. Step 5: Solve for x
    x = 17,089,809,984/84,432
  6. Step 6: Final answer
    x = 202,409.16

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.