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Finding the Fourth Proportional to 268,831.20, 403,246.80 and 111,007.20

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Solution

The fourth proportional to 268,831.20, 403,246.80 and 111,007.20 is: 166,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,831.20 : 403,246.80 = 111,007.20 : x
  2. Step 2: Convert to fraction form
    268,831.20/403,246.80 = 111,007.20/x
  3. Step 3: Cross multiply
    268,831.20x = 403,246.80 × 111,007.20
  4. Step 4: Simplify right side
    268,831.20x = 44,763,298,176.96
  5. Step 5: Solve for x
    x = 44,763,298,176.96/268,831.20
  6. Step 6: Final answer
    x = 166,510.80

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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.