Home / 128,653.66-177,628.80-80,329.24

Finding the Fourth Proportional to 128,653.66, 177,628.80 and 80,329.24

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Solution

The fourth proportional to 128,653.66, 177,628.80 and 80,329.24 is: 110,908.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,653.66 : 177,628.80 = 80,329.24 : x
  2. Step 2: Convert to fraction form
    128,653.66/177,628.80 = 80,329.24/x
  3. Step 3: Cross multiply
    128,653.66x = 177,628.80 × 80,329.24
  4. Step 4: Simplify right side
    128,653.66x = 14,268,786,506.11
  5. Step 5: Solve for x
    x = 14,268,786,506.11/128,653.66
  6. Step 6: Final answer
    x = 110,908.52

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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.