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Finding the Fourth Proportional to 158,008.33, 218,051.57 and 86,388.94

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Solution

The fourth proportional to 158,008.33, 218,051.57 and 86,388.94 is: 119,216.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,008.33 : 218,051.57 = 86,388.94 : x
  2. Step 2: Convert to fraction form
    158,008.33/218,051.57 = 86,388.94/x
  3. Step 3: Cross multiply
    158,008.33x = 218,051.57 × 86,388.94
  4. Step 4: Simplify right side
    158,008.33x = 18,837,243,997.64
  5. Step 5: Solve for x
    x = 18,837,243,997.64/158,008.33
  6. Step 6: Final answer
    x = 119,216.78

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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.