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Finding the Fourth Proportional to 66,676.74, 91,970.55 and 42,765.54

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Solution

The fourth proportional to 66,676.74, 91,970.55 and 42,765.54 is: 58,988.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,676.74 : 91,970.55 = 42,765.54 : x
  2. Step 2: Convert to fraction form
    66,676.74/91,970.55 = 42,765.54/x
  3. Step 3: Cross multiply
    66,676.74x = 91,970.55 × 42,765.54
  4. Step 4: Simplify right side
    66,676.74x = 3,933,170,234.85
  5. Step 5: Solve for x
    x = 3,933,170,234.85/66,676.74
  6. Step 6: Final answer
    x = 58,988.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.