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Finding the Fourth Proportional to 235,678.60, 325,243.30 and 128,255.56

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Solution

The fourth proportional to 235,678.60, 325,243.30 and 128,255.56 is: 176,996.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,678.60 : 325,243.30 = 128,255.56 : x
  2. Step 2: Convert to fraction form
    235,678.60/325,243.30 = 128,255.56/x
  3. Step 3: Cross multiply
    235,678.60x = 325,243.30 × 128,255.56
  4. Step 4: Simplify right side
    235,678.60x = 41,714,259,951.53
  5. Step 5: Solve for x
    x = 41,714,259,951.53/235,678.60
  6. Step 6: Final answer
    x = 176,996.39

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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.