Home / 128,963,709.70-193,193,622.15-77,693,431.30

Finding the Fourth Proportional to 128,963,709.70, 193,193,622.15 and 77,693,431.30

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Solution

The fourth proportional to 128,963,709.70, 193,193,622.15 and 77,693,431.30 is: 116,388,365.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,963,709.70 : 193,193,622.15 = 77,693,431.30 : x
  2. Step 2: Convert to fraction form
    128,963,709.70/193,193,622.15 = 77,693,431.30/x
  3. Step 3: Cross multiply
    128,963,709.70x = 193,193,622.15 × 77,693,431.30
  4. Step 4: Simplify right side
    128,963,709.70x = 15,009,875,410,109,184
  5. Step 5: Solve for x
    x = 15,009,875,410,109,184/128,963,709.70
  6. Step 6: Final answer
    x = 116,388,365.73

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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.