Home / 120,811.95-166,715.09-72,440.57

Finding the Fourth Proportional to 120,811.95, 166,715.09 and 72,440.57

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Solution

The fourth proportional to 120,811.95, 166,715.09 and 72,440.57 is: 99,964.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,811.95 : 166,715.09 = 72,440.57 : x
  2. Step 2: Convert to fraction form
    120,811.95/166,715.09 = 72,440.57/x
  3. Step 3: Cross multiply
    120,811.95x = 166,715.09 × 72,440.57
  4. Step 4: Simplify right side
    120,811.95x = 12,076,936,745.09
  5. Step 5: Solve for x
    x = 12,076,936,745.09/120,811.95
  6. Step 6: Final answer
    x = 99,964.75

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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.