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Finding the Fourth Proportional to 65,014.78, 89,709.48 and 39,516.76

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Solution

The fourth proportional to 65,014.78, 89,709.48 and 39,516.76 is: 54,526.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,014.78 : 89,709.48 = 39,516.76 : x
  2. Step 2: Convert to fraction form
    65,014.78/89,709.48 = 39,516.76/x
  3. Step 3: Cross multiply
    65,014.78x = 89,709.48 × 39,516.76
  4. Step 4: Simplify right side
    65,014.78x = 3,545,027,990.88
  5. Step 5: Solve for x
    x = 3,545,027,990.88/65,014.78
  6. Step 6: Final answer
    x = 54,526.49

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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.