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Finding the Fourth Proportional to 100,554.20, 150,831.30 and 66,874.40

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Solution

The fourth proportional to 100,554.20, 150,831.30 and 66,874.40 is: 100,311.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,554.20 : 150,831.30 = 66,874.40 : x
  2. Step 2: Convert to fraction form
    100,554.20/150,831.30 = 66,874.40/x
  3. Step 3: Cross multiply
    100,554.20x = 150,831.30 × 66,874.40
  4. Step 4: Simplify right side
    100,554.20x = 10,086,752,688.72
  5. Step 5: Solve for x
    x = 10,086,752,688.72/100,554.20
  6. Step 6: Final answer
    x = 100,311.60

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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.