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Finding the Third Proportional to 66,220.50 and 143,728.50

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Solution

The third proportional to 66,220.50 and 143,728.50 is: 311,955.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,220.50 : 143,728.50 = 143,728.50 : x
  2. Step 2: Convert to fraction form
    66,220.50/143,728.50 = 143,728.50/x
  3. Step 3: Cross multiply
    66,220.50x = 143,728.50 × 143,728.50
  4. Step 4: Simplify right side
    66,220.50x = 20,657,881,712.25
  5. Step 5: Solve for x
    x = 20,657,881,712.25/66,220.50
  6. Step 6: Final answer
    x = 311,955.99

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.