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Finding the Fourth Proportional to 169,977.60, 254,620.80 and 86,918.40

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Solution

The fourth proportional to 169,977.60, 254,620.80 and 86,918.40 is: 130,200.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,977.60 : 254,620.80 = 86,918.40 : x
  2. Step 2: Convert to fraction form
    169,977.60/254,620.80 = 86,918.40/x
  3. Step 3: Cross multiply
    169,977.60x = 254,620.80 × 86,918.40
  4. Step 4: Simplify right side
    169,977.60x = 22,131,232,542.72
  5. Step 5: Solve for x
    x = 22,131,232,542.72/169,977.60
  6. Step 6: Final answer
    x = 130,200.88

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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.