Home / 128,910,621.78-177,896,677.26-70,173,732.78

Finding the Fourth Proportional to 128,910,621.78, 177,896,677.26 and 70,173,732.78

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Solution

The fourth proportional to 128,910,621.78, 177,896,677.26 and 70,173,732.78 is: 96,839,761.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,910,621.78 : 177,896,677.26 = 70,173,732.78 : x
  2. Step 2: Convert to fraction form
    128,910,621.78/177,896,677.26 = 70,173,732.78/x
  3. Step 3: Cross multiply
    128,910,621.78x = 177,896,677.26 × 70,173,732.78
  4. Step 4: Simplify right side
    128,910,621.78x = 12,483,673,892,493,142
  5. Step 5: Solve for x
    x = 12,483,673,892,493,142/128,910,621.78
  6. Step 6: Final answer
    x = 96,839,761.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.