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Finding the Fourth Proportional to 128,023.81, 191,974.29 and 60,499.64

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Solution

The fourth proportional to 128,023.81, 191,974.29 and 60,499.64 is: 90,720.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,023.81 : 191,974.29 = 60,499.64 : x
  2. Step 2: Convert to fraction form
    128,023.81/191,974.29 = 60,499.64/x
  3. Step 3: Cross multiply
    128,023.81x = 191,974.29 × 60,499.64
  4. Step 4: Simplify right side
    128,023.81x = 11,614,375,687.32
  5. Step 5: Solve for x
    x = 11,614,375,687.32/128,023.81
  6. Step 6: Final answer
    x = 90,720.44

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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.