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Finding the Fourth Proportional to 66,859.40, 100,289.10 and 27,412.40

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Solution

The fourth proportional to 66,859.40, 100,289.10 and 27,412.40 is: 41,118.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,859.40 : 100,289.10 = 27,412.40 : x
  2. Step 2: Convert to fraction form
    66,859.40/100,289.10 = 27,412.40/x
  3. Step 3: Cross multiply
    66,859.40x = 100,289.10 × 27,412.40
  4. Step 4: Simplify right side
    66,859.40x = 2,749,164,924.84
  5. Step 5: Solve for x
    x = 2,749,164,924.84/66,859.40
  6. Step 6: Final answer
    x = 41,118.60

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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.