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Finding the Third Proportional to 30,912 and 66,751.50

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Solution

The third proportional to 30,912 and 66,751.50 is: 144,143.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,912 : 66,751.50 = 66,751.50 : x
  2. Step 2: Convert to fraction form
    30,912/66,751.50 = 66,751.50/x
  3. Step 3: Cross multiply
    30,912x = 66,751.50 × 66,751.50
  4. Step 4: Simplify right side
    30,912x = 4,455,762,752.25
  5. Step 5: Solve for x
    x = 4,455,762,752.25/30,912
  6. Step 6: Final answer
    x = 144,143.46

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.