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Finding the Fourth Proportional to 64,657.89, 96,986.85 and 20,288.10

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Solution

The fourth proportional to 64,657.89, 96,986.85 and 20,288.10 is: 30,432.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,657.89 : 96,986.85 = 20,288.10 : x
  2. Step 2: Convert to fraction form
    64,657.89/96,986.85 = 20,288.10/x
  3. Step 3: Cross multiply
    64,657.89x = 96,986.85 × 20,288.10
  4. Step 4: Simplify right side
    64,657.89x = 1,967,678,911.49
  5. Step 5: Solve for x
    x = 1,967,678,911.49/64,657.89
  6. Step 6: Final answer
    x = 30,432.15

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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.