Home / 85,974.20-128,961.30-26,809.40

Finding the Fourth Proportional to 85,974.20, 128,961.30 and 26,809.40

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Solution

The fourth proportional to 85,974.20, 128,961.30 and 26,809.40 is: 40,214.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,974.20 : 128,961.30 = 26,809.40 : x
  2. Step 2: Convert to fraction form
    85,974.20/128,961.30 = 26,809.40/x
  3. Step 3: Cross multiply
    85,974.20x = 128,961.30 × 26,809.40
  4. Step 4: Simplify right side
    85,974.20x = 3,457,375,076.22
  5. Step 5: Solve for x
    x = 3,457,375,076.22/85,974.20
  6. Step 6: Final answer
    x = 40,214.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.