Home / 128,739.64-177,474.60-90,382.42

Finding the Fourth Proportional to 128,739.64, 177,474.60 and 90,382.42

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Solution

The fourth proportional to 128,739.64, 177,474.60 and 90,382.42 is: 124,597.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,739.64 : 177,474.60 = 90,382.42 : x
  2. Step 2: Convert to fraction form
    128,739.64/177,474.60 = 90,382.42/x
  3. Step 3: Cross multiply
    128,739.64x = 177,474.60 × 90,382.42
  4. Step 4: Simplify right side
    128,739.64x = 16,040,583,836.53
  5. Step 5: Solve for x
    x = 16,040,583,836.53/128,739.64
  6. Step 6: Final answer
    x = 124,597.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.