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Finding the Fourth Proportional to 66,749.58, 100,127.70 and 19,998

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Solution

The fourth proportional to 66,749.58, 100,127.70 and 19,998 is: 29,998.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,749.58 : 100,127.70 = 19,998 : x
  2. Step 2: Convert to fraction form
    66,749.58/100,127.70 = 19,998/x
  3. Step 3: Cross multiply
    66,749.58x = 100,127.70 × 19,998
  4. Step 4: Simplify right side
    66,749.58x = 2,002,353,744.60
  5. Step 5: Solve for x
    x = 2,002,353,744.60/66,749.58
  6. Step 6: Final answer
    x = 29,998.00

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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.