Home / 128,921.28-193,381.34-40,174.86

Finding the Fourth Proportional to 128,921.28, 193,381.34 and 40,174.86

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Solution

The fourth proportional to 128,921.28, 193,381.34 and 40,174.86 is: 60,262.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,921.28 : 193,381.34 = 40,174.86 : x
  2. Step 2: Convert to fraction form
    128,921.28/193,381.34 = 40,174.86/x
  3. Step 3: Cross multiply
    128,921.28x = 193,381.34 × 40,174.86
  4. Step 4: Simplify right side
    128,921.28x = 7,769,068,261.11
  5. Step 5: Solve for x
    x = 7,769,068,261.11/128,921.28
  6. Step 6: Final answer
    x = 60,262.11

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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.