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Finding the Fourth Proportional to 257,078.17, 385,613.11 and 70,089.67

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Solution

The fourth proportional to 257,078.17, 385,613.11 and 70,089.67 is: 105,133.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,078.17 : 385,613.11 = 70,089.67 : x
  2. Step 2: Convert to fraction form
    257,078.17/385,613.11 = 70,089.67/x
  3. Step 3: Cross multiply
    257,078.17x = 385,613.11 × 70,089.67
  4. Step 4: Simplify right side
    257,078.17x = 27,027,493,524.28
  5. Step 5: Solve for x
    x = 27,027,493,524.28/257,078.17
  6. Step 6: Final answer
    x = 105,133.37

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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.