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Finding the Fourth Proportional to 69,894,411.60, 104,841,617.40 and 18,781,597.20

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Solution

The fourth proportional to 69,894,411.60, 104,841,617.40 and 18,781,597.20 is: 28,172,395.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,894,411.60 : 104,841,617.40 = 18,781,597.20 : x
  2. Step 2: Convert to fraction form
    69,894,411.60/104,841,617.40 = 18,781,597.20/x
  3. Step 3: Cross multiply
    69,894,411.60x = 104,841,617.40 × 18,781,597.20
  4. Step 4: Simplify right side
    69,894,411.60x = 1,969,093,027,803,311.25
  5. Step 5: Solve for x
    x = 1,969,093,027,803,311.25/69,894,411.60
  6. Step 6: Final answer
    x = 28,172,395.80

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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.