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Finding the Fourth Proportional to 158,010.33, 218,054.33 and 86,390.94

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Solution

The fourth proportional to 158,010.33, 218,054.33 and 86,390.94 is: 119,219.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,010.33 : 218,054.33 = 86,390.94 : x
  2. Step 2: Convert to fraction form
    158,010.33/218,054.33 = 86,390.94/x
  3. Step 3: Cross multiply
    158,010.33x = 218,054.33 × 86,390.94
  4. Step 4: Simplify right side
    158,010.33x = 18,837,918,539.77
  5. Step 5: Solve for x
    x = 18,837,918,539.77/158,010.33
  6. Step 6: Final answer
    x = 119,219.54

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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.