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Finding the Fourth Proportional to 158,008.35, 218,051.52 and 86,388.37

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Solution

The fourth proportional to 158,008.35, 218,051.52 and 86,388.37 is: 119,215.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,008.35 : 218,051.52 = 86,388.37 : x
  2. Step 2: Convert to fraction form
    158,008.35/218,051.52 = 86,388.37/x
  3. Step 3: Cross multiply
    158,008.35x = 218,051.52 × 86,388.37
  4. Step 4: Simplify right side
    158,008.35x = 18,837,115,388.82
  5. Step 5: Solve for x
    x = 18,837,115,388.82/158,008.35
  6. Step 6: Final answer
    x = 119,215.95

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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.