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Finding the Fourth Proportional to 66,309.60, 99,475.56 and 47,229.48

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Solution

The fourth proportional to 66,309.60, 99,475.56 and 47,229.48 is: 70,852.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,309.60 : 99,475.56 = 47,229.48 : x
  2. Step 2: Convert to fraction form
    66,309.60/99,475.56 = 47,229.48/x
  3. Step 3: Cross multiply
    66,309.60x = 99,475.56 × 47,229.48
  4. Step 4: Simplify right side
    66,309.60x = 4,698,178,971.51
  5. Step 5: Solve for x
    x = 4,698,178,971.51/66,309.60
  6. Step 6: Final answer
    x = 70,852.17

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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.