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Finding the Fourth Proportional to 154,939.86, 213,796.44 and 86,954.22

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Solution

The fourth proportional to 154,939.86, 213,796.44 and 86,954.22 is: 119,985.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,939.86 : 213,796.44 = 86,954.22 : x
  2. Step 2: Convert to fraction form
    154,939.86/213,796.44 = 86,954.22/x
  3. Step 3: Cross multiply
    154,939.86x = 213,796.44 × 86,954.22
  4. Step 4: Simplify right side
    154,939.86x = 18,590,502,678.98
  5. Step 5: Solve for x
    x = 18,590,502,678.98/154,939.86
  6. Step 6: Final answer
    x = 119,985.28

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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.