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Finding the Fourth Proportional to 66,703,587.80, 100,055,381.70 and 66,065,858.60

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Solution

The fourth proportional to 66,703,587.80, 100,055,381.70 and 66,065,858.60 is: 99,098,787.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,703,587.80 : 100,055,381.70 = 66,065,858.60 : x
  2. Step 2: Convert to fraction form
    66,703,587.80/100,055,381.70 = 66,065,858.60/x
  3. Step 3: Cross multiply
    66,703,587.80x = 100,055,381.70 × 66,065,858.60
  4. Step 4: Simplify right side
    66,703,587.80x = 6,610,244,699,561,228
  5. Step 5: Solve for x
    x = 6,610,244,699,561,228/66,703,587.80
  6. Step 6: Final answer
    x = 99,098,787.90

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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.