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Finding the Fourth Proportional to 51,570.93, 77,361.80 and 21,991.89

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Solution

The fourth proportional to 51,570.93, 77,361.80 and 21,991.89 is: 32,990.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,570.93 : 77,361.80 = 21,991.89 : x
  2. Step 2: Convert to fraction form
    51,570.93/77,361.80 = 21,991.89/x
  3. Step 3: Cross multiply
    51,570.93x = 77,361.80 × 21,991.89
  4. Step 4: Simplify right side
    51,570.93x = 1,701,332,195.80
  5. Step 5: Solve for x
    x = 1,701,332,195.80/51,570.93
  6. Step 6: Final answer
    x = 32,990.14

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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.