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Finding the Fourth Proportional to 158,618.64, 218,893.86 and 86,999.16

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Solution

The fourth proportional to 158,618.64, 218,893.86 and 86,999.16 is: 120,058.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,618.64 : 218,893.86 = 86,999.16 : x
  2. Step 2: Convert to fraction form
    158,618.64/218,893.86 = 86,999.16/x
  3. Step 3: Cross multiply
    158,618.64x = 218,893.86 × 86,999.16
  4. Step 4: Simplify right side
    158,618.64x = 19,043,581,949.16
  5. Step 5: Solve for x
    x = 19,043,581,949.16/158,618.64
  6. Step 6: Final answer
    x = 120,058.92

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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.