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Finding the Fourth Proportional to 66,920,625.60, 100,378,864.80 and 19,051,569.60

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Solution

The fourth proportional to 66,920,625.60, 100,378,864.80 and 19,051,569.60 is: 28,576,764.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,920,625.60 : 100,378,864.80 = 19,051,569.60 : x
  2. Step 2: Convert to fraction form
    66,920,625.60/100,378,864.80 = 19,051,569.60/x
  3. Step 3: Cross multiply
    66,920,625.60x = 100,378,864.80 × 19,051,569.60
  4. Step 4: Simplify right side
    66,920,625.60x = 1,912,374,929,106,190.25
  5. Step 5: Solve for x
    x = 1,912,374,929,106,190.25/66,920,625.60
  6. Step 6: Final answer
    x = 28,576,764.07

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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.