Home / 230,301.30-317,811-128,326.35

Finding the Fourth Proportional to 230,301.30, 317,811 and 128,326.35

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Solution

The fourth proportional to 230,301.30, 317,811 and 128,326.35 is: 177,087.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,301.30 : 317,811 = 128,326.35 : x
  2. Step 2: Convert to fraction form
    230,301.30/317,811 = 128,326.35/x
  3. Step 3: Cross multiply
    230,301.30x = 317,811 × 128,326.35
  4. Step 4: Simplify right side
    230,301.30x = 40,783,525,619.85
  5. Step 5: Solve for x
    x = 40,783,525,619.85/230,301.30
  6. Step 6: Final answer
    x = 177,087.69

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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.