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Finding the Fourth Proportional to 120,612.58, 166,454.19 and 66,907.76

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Solution

The fourth proportional to 120,612.58, 166,454.19 and 66,907.76 is: 92,337.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,612.58 : 166,454.19 = 66,907.76 : x
  2. Step 2: Convert to fraction form
    120,612.58/166,454.19 = 66,907.76/x
  3. Step 3: Cross multiply
    120,612.58x = 166,454.19 × 66,907.76
  4. Step 4: Simplify right side
    120,612.58x = 11,137,076,163.24
  5. Step 5: Solve for x
    x = 11,137,076,163.24/120,612.58
  6. Step 6: Final answer
    x = 92,337.60

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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.