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Finding the Fourth Proportional to 158,237.82, 218,368.26 and 86,618.25

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Solution

The fourth proportional to 158,237.82, 218,368.26 and 86,618.25 is: 119,533.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,237.82 : 218,368.26 = 86,618.25 : x
  2. Step 2: Convert to fraction form
    158,237.82/218,368.26 = 86,618.25/x
  3. Step 3: Cross multiply
    158,237.82x = 218,368.26 × 86,618.25
  4. Step 4: Simplify right side
    158,237.82x = 18,914,676,536.75
  5. Step 5: Solve for x
    x = 18,914,676,536.75/158,237.82
  6. Step 6: Final answer
    x = 119,533.22

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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.