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Finding the Fourth Proportional to 154,379.88, 213,029.44 and 86,393.32

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Solution

The fourth proportional to 154,379.88, 213,029.44 and 86,393.32 is: 119,214.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,379.88 : 213,029.44 = 86,393.32 : x
  2. Step 2: Convert to fraction form
    154,379.88/213,029.44 = 86,393.32/x
  3. Step 3: Cross multiply
    154,379.88x = 213,029.44 × 86,393.32
  4. Step 4: Simplify right side
    154,379.88x = 18,404,320,579.34
  5. Step 5: Solve for x
    x = 18,404,320,579.34/154,379.88
  6. Step 6: Final answer
    x = 119,214.50

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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.