Home / 149,412.08-206,185.12-81,431.20

Finding the Fourth Proportional to 149,412.08, 206,185.12 and 81,431.20

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Solution

The fourth proportional to 149,412.08, 206,185.12 and 81,431.20 is: 112,373.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,412.08 : 206,185.12 = 81,431.20 : x
  2. Step 2: Convert to fraction form
    149,412.08/206,185.12 = 81,431.20/x
  3. Step 3: Cross multiply
    149,412.08x = 206,185.12 × 81,431.20
  4. Step 4: Simplify right side
    149,412.08x = 16,789,901,743.74
  5. Step 5: Solve for x
    x = 16,789,901,743.74/149,412.08
  6. Step 6: Final answer
    x = 112,373.12

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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.