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Finding the Third Proportional to 30,312 and 66,128

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Solution

The third proportional to 30,312 and 66,128 is: 144,263.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,312 : 66,128 = 66,128 : x
  2. Step 2: Convert to fraction form
    30,312/66,128 = 66,128/x
  3. Step 3: Cross multiply
    30,312x = 66,128 × 66,128
  4. Step 4: Simplify right side
    30,312x = 4,372,912,384
  5. Step 5: Solve for x
    x = 4,372,912,384/30,312
  6. Step 6: Final answer
    x = 144,263.41

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.