Home / 85,631.16-128,399.58-26,450.40

Finding the Fourth Proportional to 85,631.16, 128,399.58 and 26,450.40

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Solution

The fourth proportional to 85,631.16, 128,399.58 and 26,450.40 is: 39,661.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,631.16 : 128,399.58 = 26,450.40 : x
  2. Step 2: Convert to fraction form
    85,631.16/128,399.58 = 26,450.40/x
  3. Step 3: Cross multiply
    85,631.16x = 128,399.58 × 26,450.40
  4. Step 4: Simplify right side
    85,631.16x = 3,396,220,250.83
  5. Step 5: Solve for x
    x = 3,396,220,250.83/85,631.16
  6. Step 6: Final answer
    x = 39,661.03

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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.