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Finding the Fourth Proportional to 127,848,019.20, 191,772,028.80 and 87,033,350.40

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Solution

The fourth proportional to 127,848,019.20, 191,772,028.80 and 87,033,350.40 is: 130,550,025.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,848,019.20 : 191,772,028.80 = 87,033,350.40 : x
  2. Step 2: Convert to fraction form
    127,848,019.20/191,772,028.80 = 87,033,350.40/x
  3. Step 3: Cross multiply
    127,848,019.20x = 191,772,028.80 × 87,033,350.40
  4. Step 4: Simplify right side
    127,848,019.20x = 16,690,562,179,469,294
  5. Step 5: Solve for x
    x = 16,690,562,179,469,294/127,848,019.20
  6. Step 6: Final answer
    x = 130,550,025.60

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1.5x scale

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.