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Finding the Fourth Proportional to 86,910.47, 119,669.91 and 76,093.48

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Solution

The fourth proportional to 86,910.47, 119,669.91 and 76,093.48 is: 104,775.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,910.47 : 119,669.91 = 76,093.48 : x
  2. Step 2: Convert to fraction form
    86,910.47/119,669.91 = 76,093.48/x
  3. Step 3: Cross multiply
    86,910.47x = 119,669.91 × 76,093.48
  4. Step 4: Simplify right side
    86,910.47x = 9,106,099,094.28
  5. Step 5: Solve for x
    x = 9,106,099,094.28/86,910.47
  6. Step 6: Final answer
    x = 104,775.63

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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.