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Finding the Fourth Proportional to 64,647.15, 96,970.71 and 20,277.78

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Solution

The fourth proportional to 64,647.15, 96,970.71 and 20,277.78 is: 30,416.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,647.15 : 96,970.71 = 20,277.78 : x
  2. Step 2: Convert to fraction form
    64,647.15/96,970.71 = 20,277.78/x
  3. Step 3: Cross multiply
    64,647.15x = 96,970.71 × 20,277.78
  4. Step 4: Simplify right side
    64,647.15x = 1,966,350,723.82
  5. Step 5: Solve for x
    x = 1,966,350,723.82/64,647.15
  6. Step 6: Final answer
    x = 30,416.67

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1.5x scale

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.