Home / 149,969.80-206,959.08-81,985.78

Finding the Fourth Proportional to 149,969.80, 206,959.08 and 81,985.78

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Solution

The fourth proportional to 149,969.80, 206,959.08 and 81,985.78 is: 113,140.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,969.80 : 206,959.08 = 81,985.78 : x
  2. Step 2: Convert to fraction form
    149,969.80/206,959.08 = 81,985.78/x
  3. Step 3: Cross multiply
    149,969.80x = 206,959.08 × 81,985.78
  4. Step 4: Simplify right side
    149,969.80x = 16,967,701,601.88
  5. Step 5: Solve for x
    x = 16,967,701,601.88/149,969.80
  6. Step 6: Final answer
    x = 113,140.79

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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.