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Finding the Fourth Proportional to 169,980.60, 254,625.30 and 86,921.40

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Solution

The fourth proportional to 169,980.60, 254,625.30 and 86,921.40 is: 130,205.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,980.60 : 254,625.30 = 86,921.40 : x
  2. Step 2: Convert to fraction form
    169,980.60/254,625.30 = 86,921.40/x
  3. Step 3: Cross multiply
    169,980.60x = 254,625.30 × 86,921.40
  4. Step 4: Simplify right side
    169,980.60x = 22,132,387,551.42
  5. Step 5: Solve for x
    x = 22,132,387,551.42/169,980.60
  6. Step 6: Final answer
    x = 130,205.37

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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.