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Finding the Fourth Proportional to 230,915.46, 318,660.21 and 128,942.67

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Solution

The fourth proportional to 230,915.46, 318,660.21 and 128,942.67 is: 177,939.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,915.46 : 318,660.21 = 128,942.67 : x
  2. Step 2: Convert to fraction form
    230,915.46/318,660.21 = 128,942.67/x
  3. Step 3: Cross multiply
    230,915.46x = 318,660.21 × 128,942.67
  4. Step 4: Simplify right side
    230,915.46x = 41,088,898,300.16
  5. Step 5: Solve for x
    x = 41,088,898,300.16/230,915.46
  6. Step 6: Final answer
    x = 177,939.14

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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.