Home / 261,110,972.72-391,669,189.81-76,881,936.98

Finding the Fourth Proportional to 261,110,972.72, 391,669,189.81 and 76,881,936.98

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Solution

The fourth proportional to 261,110,972.72, 391,669,189.81 and 76,881,936.98 is: 115,323,709.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,110,972.72 : 391,669,189.81 = 76,881,936.98 : x
  2. Step 2: Convert to fraction form
    261,110,972.72/391,669,189.81 = 76,881,936.98/x
  3. Step 3: Cross multiply
    261,110,972.72x = 391,669,189.81 × 76,881,936.98
  4. Step 4: Simplify right side
    261,110,972.72x = 30,112,285,968,767,048
  5. Step 5: Solve for x
    x = 30,112,285,968,767,048/261,110,972.72
  6. Step 6: Final answer
    x = 115,323,709.51

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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.