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Finding the Fourth Proportional to 168,991.60, 253,487.40 and 86,047.60

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Solution

The fourth proportional to 168,991.60, 253,487.40 and 86,047.60 is: 129,071.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,991.60 : 253,487.40 = 86,047.60 : x
  2. Step 2: Convert to fraction form
    168,991.60/253,487.40 = 86,047.60/x
  3. Step 3: Cross multiply
    168,991.60x = 253,487.40 × 86,047.60
  4. Step 4: Simplify right side
    168,991.60x = 21,811,982,400.24
  5. Step 5: Solve for x
    x = 21,811,982,400.24/168,991.60
  6. Step 6: Final answer
    x = 129,071.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.