Home / 85,140.24-127,513.53-82,187.79

Finding the Fourth Proportional to 85,140.24, 127,513.53 and 82,187.79

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Solution

The fourth proportional to 85,140.24, 127,513.53 and 82,187.79 is: 123,091.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,140.24 : 127,513.53 = 82,187.79 : x
  2. Step 2: Convert to fraction form
    85,140.24/127,513.53 = 82,187.79/x
  3. Step 3: Cross multiply
    85,140.24x = 127,513.53 × 82,187.79
  4. Step 4: Simplify right side
    85,140.24x = 10,480,055,225.80
  5. Step 5: Solve for x
    x = 10,480,055,225.80/85,140.24
  6. Step 6: Final answer
    x = 123,091.68

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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.