Home / 109,336.40-163,982.20-30,430.80

Finding the Fourth Proportional to 109,336.40, 163,982.20 and 30,430.80

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Solution

The fourth proportional to 109,336.40, 163,982.20 and 30,430.80 is: 45,639.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,336.40 : 163,982.20 = 30,430.80 : x
  2. Step 2: Convert to fraction form
    109,336.40/163,982.20 = 30,430.80/x
  3. Step 3: Cross multiply
    109,336.40x = 163,982.20 × 30,430.80
  4. Step 4: Simplify right side
    109,336.40x = 4,990,109,531.76
  5. Step 5: Solve for x
    x = 4,990,109,531.76/109,336.40
  6. Step 6: Final answer
    x = 45,639.97

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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.