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Finding the Fourth Proportional to 70,938,127.20, 106,407,190.80 and 70,938,127.20

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Solution

The fourth proportional to 70,938,127.20, 106,407,190.80 and 70,938,127.20 is: 106,407,190.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,938,127.20 : 106,407,190.80 = 70,938,127.20 : x
  2. Step 2: Convert to fraction form
    70,938,127.20/106,407,190.80 = 70,938,127.20/x
  3. Step 3: Cross multiply
    70,938,127.20x = 106,407,190.80 × 70,938,127.20
  4. Step 4: Simplify right side
    70,938,127.20x = 7,548,326,835,965,070
  5. Step 5: Solve for x
    x = 7,548,326,835,965,070/70,938,127.20
  6. Step 6: Final answer
    x = 106,407,190.80

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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.