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Finding the Third Proportional to 142,821.75 and 209,812.50

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Solution

The third proportional to 142,821.75 and 209,812.50 is: 308,225.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,821.75 : 209,812.50 = 209,812.50 : x
  2. Step 2: Convert to fraction form
    142,821.75/209,812.50 = 209,812.50/x
  3. Step 3: Cross multiply
    142,821.75x = 209,812.50 × 209,812.50
  4. Step 4: Simplify right side
    142,821.75x = 44,021,285,156.25
  5. Step 5: Solve for x
    x = 44,021,285,156.25/142,821.75
  6. Step 6: Final answer
    x = 308,225.36

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.