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Finding the Fourth Proportional to 158,511.56, 218,744.96 and 86,894.60

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Solution

The fourth proportional to 158,511.56, 218,744.96 and 86,894.60 is: 119,914.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,511.56 : 218,744.96 = 86,894.60 : x
  2. Step 2: Convert to fraction form
    158,511.56/218,744.96 = 86,894.60/x
  3. Step 3: Cross multiply
    158,511.56x = 218,744.96 × 86,894.60
  4. Step 4: Simplify right side
    158,511.56x = 19,007,754,273.02
  5. Step 5: Solve for x
    x = 19,007,754,273.02/158,511.56
  6. Step 6: Final answer
    x = 119,914.00

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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.