Home / 120,511.56-166,310.28-72,755.64

Finding the Fourth Proportional to 120,511.56, 166,310.28 and 72,755.64

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Solution

The fourth proportional to 120,511.56, 166,310.28 and 72,755.64 is: 100,405.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,511.56 : 166,310.28 = 72,755.64 : x
  2. Step 2: Convert to fraction form
    120,511.56/166,310.28 = 72,755.64/x
  3. Step 3: Cross multiply
    120,511.56x = 166,310.28 × 72,755.64
  4. Step 4: Simplify right side
    120,511.56x = 12,100,010,859.98
  5. Step 5: Solve for x
    x = 12,100,010,859.98/120,511.56
  6. Step 6: Final answer
    x = 100,405.40

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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.