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Finding the Fourth Proportional to 136,744.43, 205,190.30 and 66,623.74

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Solution

The fourth proportional to 136,744.43, 205,190.30 and 66,623.74 is: 99,971.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,744.43 : 205,190.30 = 66,623.74 : x
  2. Step 2: Convert to fraction form
    136,744.43/205,190.30 = 66,623.74/x
  3. Step 3: Cross multiply
    136,744.43x = 205,190.30 × 66,623.74
  4. Step 4: Simplify right side
    136,744.43x = 13,670,544,851.31
  5. Step 5: Solve for x
    x = 13,670,544,851.31/136,744.43
  6. Step 6: Final answer
    x = 99,971.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.