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Finding the Third Proportional to 39,528 and 86,430

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Solution

The third proportional to 39,528 and 86,430 is: 188,983.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,528 : 86,430 = 86,430 : x
  2. Step 2: Convert to fraction form
    39,528/86,430 = 86,430/x
  3. Step 3: Cross multiply
    39,528x = 86,430 × 86,430
  4. Step 4: Simplify right side
    39,528x = 7,470,144,900
  5. Step 5: Solve for x
    x = 7,470,144,900/39,528
  6. Step 6: Final answer
    x = 188,983.63

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.