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Finding the Fourth Proportional to 120,860.63, 166,790.63 and 66,412.35

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Solution

The fourth proportional to 120,860.63, 166,790.63 and 66,412.35 is: 91,650.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,860.63 : 166,790.63 = 66,412.35 : x
  2. Step 2: Convert to fraction form
    120,860.63/166,790.63 = 66,412.35/x
  3. Step 3: Cross multiply
    120,860.63x = 166,790.63 × 66,412.35
  4. Step 4: Simplify right side
    120,860.63x = 11,076,957,364.22
  5. Step 5: Solve for x
    x = 11,076,957,364.22/120,860.63
  6. Step 6: Final answer
    x = 91,650.67

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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.