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Finding the Fourth Proportional to 70,481,622.60, 105,722,433.90 and 51,349,746.60

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Solution

The fourth proportional to 70,481,622.60, 105,722,433.90 and 51,349,746.60 is: 77,024,619.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,481,622.60 : 105,722,433.90 = 51,349,746.60 : x
  2. Step 2: Convert to fraction form
    70,481,622.60/105,722,433.90 = 51,349,746.60/x
  3. Step 3: Cross multiply
    70,481,622.60x = 105,722,433.90 × 51,349,746.60
  4. Step 4: Simplify right side
    70,481,622.60x = 5,428,820,190,700,250
  5. Step 5: Solve for x
    x = 5,428,820,190,700,250/70,481,622.60
  6. Step 6: Final answer
    x = 77,024,619.90

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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.