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Finding the Third Proportional to 30,005.50 and 64,628

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Solution

The third proportional to 30,005.50 and 64,628 is: 139,200.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,005.50 : 64,628 = 64,628 : x
  2. Step 2: Convert to fraction form
    30,005.50/64,628 = 64,628/x
  3. Step 3: Cross multiply
    30,005.50x = 64,628 × 64,628
  4. Step 4: Simplify right side
    30,005.50x = 4,176,778,384
  5. Step 5: Solve for x
    x = 4,176,778,384/30,005.50
  6. Step 6: Final answer
    x = 139,200.43

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.