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Finding the Fourth Proportional to 128,656.37, 193,003.17 and 48,672.65

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Solution

The fourth proportional to 128,656.37, 193,003.17 and 48,672.65 is: 73,016.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,656.37 : 193,003.17 = 48,672.65 : x
  2. Step 2: Convert to fraction form
    128,656.37/193,003.17 = 48,672.65/x
  3. Step 3: Cross multiply
    128,656.37x = 193,003.17 × 48,672.65
  4. Step 4: Simplify right side
    128,656.37x = 9,393,976,224.81
  5. Step 5: Solve for x
    x = 9,393,976,224.81/128,656.37
  6. Step 6: Final answer
    x = 73,016.02

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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.