Home / 135,219.20-202,828.80-85,355.60

Finding the Fourth Proportional to 135,219.20, 202,828.80 and 85,355.60

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Solution

The fourth proportional to 135,219.20, 202,828.80 and 85,355.60 is: 128,033.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,219.20 : 202,828.80 = 85,355.60 : x
  2. Step 2: Convert to fraction form
    135,219.20/202,828.80 = 85,355.60/x
  3. Step 3: Cross multiply
    135,219.20x = 202,828.80 × 85,355.60
  4. Step 4: Simplify right side
    135,219.20x = 17,312,573,921.28
  5. Step 5: Solve for x
    x = 17,312,573,921.28/135,219.20
  6. Step 6: Final answer
    x = 128,033.40

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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.