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Finding the Fourth Proportional to 66,605.51, 99,905.96 and 16,686.03

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Solution

The fourth proportional to 66,605.51, 99,905.96 and 16,686.03 is: 25,028.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,605.51 : 99,905.96 = 16,686.03 : x
  2. Step 2: Convert to fraction form
    66,605.51/99,905.96 = 16,686.03/x
  3. Step 3: Cross multiply
    66,605.51x = 99,905.96 × 16,686.03
  4. Step 4: Simplify right side
    66,605.51x = 1,667,033,762.31
  5. Step 5: Solve for x
    x = 1,667,033,762.31/66,605.51
  6. Step 6: Final answer
    x = 25,028.47

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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.