Home / 85,965,025.80-128,947,538.70-78,028,840.20

Finding the Fourth Proportional to 85,965,025.80, 128,947,538.70 and 78,028,840.20

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Solution

The fourth proportional to 85,965,025.80, 128,947,538.70 and 78,028,840.20 is: 117,043,260.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,965,025.80 : 128,947,538.70 = 78,028,840.20 : x
  2. Step 2: Convert to fraction form
    85,965,025.80/128,947,538.70 = 78,028,840.20/x
  3. Step 3: Cross multiply
    85,965,025.80x = 128,947,538.70 × 78,028,840.20
  4. Step 4: Simplify right side
    85,965,025.80x = 10,061,626,891,405,616
  5. Step 5: Solve for x
    x = 10,061,626,891,405,616/85,965,025.80
  6. Step 6: Final answer
    x = 117,043,260.30

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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.