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Finding the Fourth Proportional to 216,831.40, 325,344.30 and 98,441.80

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Solution

The fourth proportional to 216,831.40, 325,344.30 and 98,441.80 is: 147,706.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,831.40 : 325,344.30 = 98,441.80 : x
  2. Step 2: Convert to fraction form
    216,831.40/325,344.30 = 98,441.80/x
  3. Step 3: Cross multiply
    216,831.40x = 325,344.30 × 98,441.80
  4. Step 4: Simplify right side
    216,831.40x = 32,027,478,511.74
  5. Step 5: Solve for x
    x = 32,027,478,511.74/216,831.40
  6. Step 6: Final answer
    x = 147,706.83

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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.