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Finding the Fourth Proportional to 64,990.62, 97,499.70 and 20,611.53

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Solution

The fourth proportional to 64,990.62, 97,499.70 and 20,611.53 is: 30,921.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,990.62 : 97,499.70 = 20,611.53 : x
  2. Step 2: Convert to fraction form
    64,990.62/97,499.70 = 20,611.53/x
  3. Step 3: Cross multiply
    64,990.62x = 97,499.70 × 20,611.53
  4. Step 4: Simplify right side
    64,990.62x = 2,009,617,991.54
  5. Step 5: Solve for x
    x = 2,009,617,991.54/64,990.62
  6. Step 6: Final answer
    x = 30,921.66

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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.