Home / 149,947.94-206,928.16-81,965.20

Finding the Fourth Proportional to 149,947.94, 206,928.16 and 81,965.20

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Solution

The fourth proportional to 149,947.94, 206,928.16 and 81,965.20 is: 113,111.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,947.94 : 206,928.16 = 81,965.20 : x
  2. Step 2: Convert to fraction form
    149,947.94/206,928.16 = 81,965.20/x
  3. Step 3: Cross multiply
    149,947.94x = 206,928.16 × 81,965.20
  4. Step 4: Simplify right side
    149,947.94x = 16,960,908,146.84
  5. Step 5: Solve for x
    x = 16,960,908,146.84/149,947.94
  6. Step 6: Final answer
    x = 113,111.98

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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.