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Finding the Fourth Proportional to 66,989.35, 100,407.58 and 26,982.72

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Solution

The fourth proportional to 66,989.35, 100,407.58 and 26,982.72 is: 40,443.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,989.35 : 100,407.58 = 26,982.72 : x
  2. Step 2: Convert to fraction form
    66,989.35/100,407.58 = 26,982.72/x
  3. Step 3: Cross multiply
    66,989.35x = 100,407.58 × 26,982.72
  4. Step 4: Simplify right side
    66,989.35x = 2,709,270,027.27
  5. Step 5: Solve for x
    x = 2,709,270,027.27/66,989.35
  6. Step 6: Final answer
    x = 40,443.30

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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.