Home / 128,286,377.82-177,054,369.75-100,989,714.78

Finding the Fourth Proportional to 128,286,377.82, 177,054,369.75 and 100,989,714.78

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Solution

The fourth proportional to 128,286,377.82, 177,054,369.75 and 100,989,714.78 is: 139,380,896.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,286,377.82 : 177,054,369.75 = 100,989,714.78 : x
  2. Step 2: Convert to fraction form
    128,286,377.82/177,054,369.75 = 100,989,714.78/x
  3. Step 3: Cross multiply
    128,286,377.82x = 177,054,369.75 × 100,989,714.78
  4. Step 4: Simplify right side
    128,286,377.82x = 17,880,670,301,605,160
  5. Step 5: Solve for x
    x = 17,880,670,301,605,160/128,286,377.82
  6. Step 6: Final answer
    x = 139,380,896.13

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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.