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Finding the Fourth Proportional to 77,066, 115,599 and 18,698

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Solution

The fourth proportional to 77,066, 115,599 and 18,698 is: 28,047

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,066 : 115,599 = 18,698 : x
  2. Step 2: Convert to fraction form
    77,066/115,599 = 18,698/x
  3. Step 3: Cross multiply
    77,066x = 115,599 × 18,698
  4. Step 4: Simplify right side
    77,066x = 2,161,470,102
  5. Step 5: Solve for x
    x = 2,161,470,102/77,066
  6. Step 6: Final answer
    x = 28,047

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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.