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Finding the Fourth Proportional to 168,999.60, 253,499.40 and 86,055.60

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Solution

The fourth proportional to 168,999.60, 253,499.40 and 86,055.60 is: 129,083.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,999.60 : 253,499.40 = 86,055.60 : x
  2. Step 2: Convert to fraction form
    168,999.60/253,499.40 = 86,055.60/x
  3. Step 3: Cross multiply
    168,999.60x = 253,499.40 × 86,055.60
  4. Step 4: Simplify right side
    168,999.60x = 21,815,042,966.64
  5. Step 5: Solve for x
    x = 21,815,042,966.64/168,999.60
  6. Step 6: Final answer
    x = 129,083.40

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1.5x scale

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.