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Finding the Fourth Proportional to 351,423.68, 527,130.86 and 85,186.53

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Solution

The fourth proportional to 351,423.68, 527,130.86 and 85,186.53 is: 127,778.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,423.68 : 527,130.86 = 85,186.53 : x
  2. Step 2: Convert to fraction form
    351,423.68/527,130.86 = 85,186.53/x
  3. Step 3: Cross multiply
    351,423.68x = 527,130.86 × 85,186.53
  4. Step 4: Simplify right side
    351,423.68x = 44,904,448,393.38
  5. Step 5: Solve for x
    x = 44,904,448,393.38/351,423.68
  6. Step 6: Final answer
    x = 127,778.67

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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.