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Finding the Fourth Proportional to 128,679.22, 193,055.28 and 53,835.22

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Solution

The fourth proportional to 128,679.22, 193,055.28 and 53,835.22 is: 80,768.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,679.22 : 193,055.28 = 53,835.22 : x
  2. Step 2: Convert to fraction form
    128,679.22/193,055.28 = 53,835.22/x
  3. Step 3: Cross multiply
    128,679.22x = 193,055.28 × 53,835.22
  4. Step 4: Simplify right side
    128,679.22x = 10,393,173,470.96
  5. Step 5: Solve for x
    x = 10,393,173,470.96/128,679.22
  6. Step 6: Final answer
    x = 80,768.08

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1.5x scale

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.