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Finding the Fourth Proportional to 66,659.76, 99,989.64 and 46,014.48

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Solution

The fourth proportional to 66,659.76, 99,989.64 and 46,014.48 is: 69,021.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,659.76 : 99,989.64 = 46,014.48 : x
  2. Step 2: Convert to fraction form
    66,659.76/99,989.64 = 46,014.48/x
  3. Step 3: Cross multiply
    66,659.76x = 99,989.64 × 46,014.48
  4. Step 4: Simplify right side
    66,659.76x = 4,600,971,289.99
  5. Step 5: Solve for x
    x = 4,600,971,289.99/66,659.76
  6. Step 6: Final answer
    x = 69,021.72

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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.