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Finding the Fourth Proportional to 230,358.78, 317,853.05 and 128,381.67

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Solution

The fourth proportional to 230,358.78, 317,853.05 and 128,381.67 is: 177,143.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,358.78 : 317,853.05 = 128,381.67 : x
  2. Step 2: Convert to fraction form
    230,358.78/317,853.05 = 128,381.67/x
  3. Step 3: Cross multiply
    230,358.78x = 317,853.05 × 128,381.67
  4. Step 4: Simplify right side
    230,358.78x = 40,806,504,731.69
  5. Step 5: Solve for x
    x = 40,806,504,731.69/230,358.78
  6. Step 6: Final answer
    x = 177,143.26

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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.