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Finding the Fourth Proportional to 128,873.52, 177,441.30 and 117,063.72

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Solution

The fourth proportional to 128,873.52, 177,441.30 and 117,063.72 is: 161,180.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,873.52 : 177,441.30 = 117,063.72 : x
  2. Step 2: Convert to fraction form
    128,873.52/177,441.30 = 117,063.72/x
  3. Step 3: Cross multiply
    128,873.52x = 177,441.30 × 117,063.72
  4. Step 4: Simplify right side
    128,873.52x = 20,771,938,659.64
  5. Step 5: Solve for x
    x = 20,771,938,659.64/128,873.52
  6. Step 6: Final answer
    x = 161,180.81

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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.