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Finding the Fourth Proportional to 77,070, 115,605.03 and 21,666

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Solution

The fourth proportional to 77,070, 115,605.03 and 21,666 is: 32,499.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,070 : 115,605.03 = 21,666 : x
  2. Step 2: Convert to fraction form
    77,070/115,605.03 = 21,666/x
  3. Step 3: Cross multiply
    77,070x = 115,605.03 × 21,666
  4. Step 4: Simplify right side
    77,070x = 2,504,698,579.98
  5. Step 5: Solve for x
    x = 2,504,698,579.98/77,070
  6. Step 6: Final answer
    x = 32,499.01

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