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Finding the Fourth Proportional to 169,965.60, 255,021.30 and 86,859.60

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Solution

The fourth proportional to 169,965.60, 255,021.30 and 86,859.60 is: 130,326.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,965.60 : 255,021.30 = 86,859.60 : x
  2. Step 2: Convert to fraction form
    169,965.60/255,021.30 = 86,859.60/x
  3. Step 3: Cross multiply
    169,965.60x = 255,021.30 × 86,859.60
  4. Step 4: Simplify right side
    169,965.60x = 22,151,048,109.48
  5. Step 5: Solve for x
    x = 22,151,048,109.48/169,965.60
  6. Step 6: Final answer
    x = 130,326.65

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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.