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Finding the Fourth Proportional to 19,319,140.40, 28,978,710.60 and 10,361,188.40

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Solution

The fourth proportional to 19,319,140.40, 28,978,710.60 and 10,361,188.40 is: 15,541,782.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,319,140.40 : 28,978,710.60 = 10,361,188.40 : x
  2. Step 2: Convert to fraction form
    19,319,140.40/28,978,710.60 = 10,361,188.40/x
  3. Step 3: Cross multiply
    19,319,140.40x = 28,978,710.60 × 10,361,188.40
  4. Step 4: Simplify right side
    19,319,140.40x = 300,253,880,115,677.06
  5. Step 5: Solve for x
    x = 300,253,880,115,677.06/19,319,140.40
  6. Step 6: Final answer
    x = 15,541,782.60

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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.