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Finding the Fourth Proportional to 66,018.24, 98,874.81 and 39,664.89

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Solution

The fourth proportional to 66,018.24, 98,874.81 and 39,664.89 is: 59,405.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,018.24 : 98,874.81 = 39,664.89 : x
  2. Step 2: Convert to fraction form
    66,018.24/98,874.81 = 39,664.89/x
  3. Step 3: Cross multiply
    66,018.24x = 98,874.81 × 39,664.89
  4. Step 4: Simplify right side
    66,018.24x = 3,921,858,462.42
  5. Step 5: Solve for x
    x = 3,921,858,462.42/66,018.24
  6. Step 6: Final answer
    x = 59,405.68

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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.