Home / 85,826.40-128,739.60-81,452.40

Finding the Fourth Proportional to 85,826.40, 128,739.60 and 81,452.40

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Solution

The fourth proportional to 85,826.40, 128,739.60 and 81,452.40 is: 122,178.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,826.40 : 128,739.60 = 81,452.40 : x
  2. Step 2: Convert to fraction form
    85,826.40/128,739.60 = 81,452.40/x
  3. Step 3: Cross multiply
    85,826.40x = 128,739.60 × 81,452.40
  4. Step 4: Simplify right side
    85,826.40x = 10,486,149,395.04
  5. Step 5: Solve for x
    x = 10,486,149,395.04/85,826.40
  6. Step 6: Final answer
    x = 122,178.60

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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.