Home / 100,440.28-150,684.78-30,315.40

Finding the Fourth Proportional to 100,440.28, 150,684.78 and 30,315.40

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Solution

The fourth proportional to 100,440.28, 150,684.78 and 30,315.40 is: 45,480.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,440.28 : 150,684.78 = 30,315.40 : x
  2. Step 2: Convert to fraction form
    100,440.28/150,684.78 = 30,315.40/x
  3. Step 3: Cross multiply
    100,440.28x = 150,684.78 × 30,315.40
  4. Step 4: Simplify right side
    100,440.28x = 4,568,069,379.61
  5. Step 5: Solve for x
    x = 4,568,069,379.61/100,440.28
  6. Step 6: Final answer
    x = 45,480.45

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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.