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Finding the Fourth Proportional to 66,656.70, 99,999.45 and 19,914.30

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Solution

The fourth proportional to 66,656.70, 99,999.45 and 19,914.30 is: 29,875.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,656.70 : 99,999.45 = 19,914.30 : x
  2. Step 2: Convert to fraction form
    66,656.70/99,999.45 = 19,914.30/x
  3. Step 3: Cross multiply
    66,656.70x = 99,999.45 × 19,914.30
  4. Step 4: Simplify right side
    66,656.70x = 1,991,419,047.14
  5. Step 5: Solve for x
    x = 1,991,419,047.14/66,656.70
  6. Step 6: Final answer
    x = 29,875.75

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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.