Home / 86,634.64-129,879.06-42,238.54

Finding the Fourth Proportional to 86,634.64, 129,879.06 and 42,238.54

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Solution

The fourth proportional to 86,634.64, 129,879.06 and 42,238.54 is: 63,322.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,634.64 : 129,879.06 = 42,238.54 : x
  2. Step 2: Convert to fraction form
    86,634.64/129,879.06 = 42,238.54/x
  3. Step 3: Cross multiply
    86,634.64x = 129,879.06 × 42,238.54
  4. Step 4: Simplify right side
    86,634.64x = 5,485,901,870.97
  5. Step 5: Solve for x
    x = 5,485,901,870.97/86,634.64
  6. Step 6: Final answer
    x = 63,322.27

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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.