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Finding the Fourth Proportional to 90,656.77, 135,910.23 and 40,019.77

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Solution

The fourth proportional to 90,656.77, 135,910.23 and 40,019.77 is: 59,996.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,656.77 : 135,910.23 = 40,019.77 : x
  2. Step 2: Convert to fraction form
    90,656.77/135,910.23 = 40,019.77/x
  3. Step 3: Cross multiply
    90,656.77x = 135,910.23 × 40,019.77
  4. Step 4: Simplify right side
    90,656.77x = 5,439,096,145.25
  5. Step 5: Solve for x
    x = 5,439,096,145.25/90,656.77
  6. Step 6: Final answer
    x = 59,996.58

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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.