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Finding the Fourth Proportional to 381,756.76, 572,540.56 and 129,031.67

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Solution

The fourth proportional to 381,756.76, 572,540.56 and 129,031.67 is: 193,515.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,756.76 : 572,540.56 = 129,031.67 : x
  2. Step 2: Convert to fraction form
    381,756.76/572,540.56 = 129,031.67/x
  3. Step 3: Cross multiply
    381,756.76x = 572,540.56 × 129,031.67
  4. Step 4: Simplify right side
    381,756.76x = 73,875,865,708.31
  5. Step 5: Solve for x
    x = 73,875,865,708.31/381,756.76
  6. Step 6: Final answer
    x = 193,515.54

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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.