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Finding the Fourth Proportional to 120,611.19, 166,453.65 and 66,913.50

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Solution

The fourth proportional to 120,611.19, 166,453.65 and 66,913.50 is: 92,346.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,611.19 : 166,453.65 = 66,913.50 : x
  2. Step 2: Convert to fraction form
    120,611.19/166,453.65 = 66,913.50/x
  3. Step 3: Cross multiply
    120,611.19x = 166,453.65 × 66,913.50
  4. Step 4: Simplify right side
    120,611.19x = 11,137,996,309.28
  5. Step 5: Solve for x
    x = 11,137,996,309.28/120,611.19
  6. Step 6: Final answer
    x = 92,346.29

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1.5x scale

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.