Home / 259,021.20-388,531.80-109,430.40

Finding the Fourth Proportional to 259,021.20, 388,531.80 and 109,430.40

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Solution

The fourth proportional to 259,021.20, 388,531.80 and 109,430.40 is: 164,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,021.20 : 388,531.80 = 109,430.40 : x
  2. Step 2: Convert to fraction form
    259,021.20/388,531.80 = 109,430.40/x
  3. Step 3: Cross multiply
    259,021.20x = 388,531.80 × 109,430.40
  4. Step 4: Simplify right side
    259,021.20x = 42,517,190,286.72
  5. Step 5: Solve for x
    x = 42,517,190,286.72/259,021.20
  6. Step 6: Final answer
    x = 164,145.60

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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.