Home / 85,382.51-127,197.14-81,544.32

Finding the Fourth Proportional to 85,382.51, 127,197.14 and 81,544.32

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Solution

The fourth proportional to 85,382.51, 127,197.14 and 81,544.32 is: 121,479.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,382.51 : 127,197.14 = 81,544.32 : x
  2. Step 2: Convert to fraction form
    85,382.51/127,197.14 = 81,544.32/x
  3. Step 3: Cross multiply
    85,382.51x = 127,197.14 × 81,544.32
  4. Step 4: Simplify right side
    85,382.51x = 10,372,203,879.52
  5. Step 5: Solve for x
    x = 10,372,203,879.52/85,382.51
  6. Step 6: Final answer
    x = 121,479.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.