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Finding the Fourth Proportional to 230,678.80, 318,336.30 and 128,698.19

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Solution

The fourth proportional to 230,678.80, 318,336.30 and 128,698.19 is: 177,603.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,678.80 : 318,336.30 = 128,698.19 : x
  2. Step 2: Convert to fraction form
    230,678.80/318,336.30 = 128,698.19/x
  3. Step 3: Cross multiply
    230,678.80x = 318,336.30 × 128,698.19
  4. Step 4: Simplify right side
    230,678.80x = 40,969,306,480.66
  5. Step 5: Solve for x
    x = 40,969,306,480.66/230,678.80
  6. Step 6: Final answer
    x = 177,603.26

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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.