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Finding the Fourth Proportional to 139,882.92, 193,038.39 and 76,220.67

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Solution

The fourth proportional to 139,882.92, 193,038.39 and 76,220.67 is: 105,184.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,882.92 : 193,038.39 = 76,220.67 : x
  2. Step 2: Convert to fraction form
    139,882.92/193,038.39 = 76,220.67/x
  3. Step 3: Cross multiply
    139,882.92x = 193,038.39 × 76,220.67
  4. Step 4: Simplify right side
    139,882.92x = 14,713,515,421.52
  5. Step 5: Solve for x
    x = 14,713,515,421.52/139,882.92
  6. Step 6: Final answer
    x = 105,184.50

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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.