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Finding the Fourth Proportional to 128,383.60, 177,213.92 and 88,230.28

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Solution

The fourth proportional to 128,383.60, 177,213.92 and 88,230.28 is: 121,788.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,383.60 : 177,213.92 = 88,230.28 : x
  2. Step 2: Convert to fraction form
    128,383.60/177,213.92 = 88,230.28/x
  3. Step 3: Cross multiply
    128,383.60x = 177,213.92 × 88,230.28
  4. Step 4: Simplify right side
    128,383.60x = 15,635,633,781.50
  5. Step 5: Solve for x
    x = 15,635,633,781.50/128,383.60
  6. Step 6: Final answer
    x = 121,788.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.