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Finding the Fourth Proportional to 231,059.96, 318,831.20 and 129,072.81

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Solution

The fourth proportional to 231,059.96, 318,831.20 and 129,072.81 is: 178,102.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,059.96 : 318,831.20 = 129,072.81 : x
  2. Step 2: Convert to fraction form
    231,059.96/318,831.20 = 129,072.81/x
  3. Step 3: Cross multiply
    231,059.96x = 318,831.20 × 129,072.81
  4. Step 4: Simplify right side
    231,059.96x = 41,152,439,933.95
  5. Step 5: Solve for x
    x = 41,152,439,933.95/231,059.96
  6. Step 6: Final answer
    x = 178,102.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.