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Finding the Fourth Proportional to 90,718.86, 135,881.37 and 43,873.50

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Solution

The fourth proportional to 90,718.86, 135,881.37 and 43,873.50 is: 65,715.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,718.86 : 135,881.37 = 43,873.50 : x
  2. Step 2: Convert to fraction form
    90,718.86/135,881.37 = 43,873.50/x
  3. Step 3: Cross multiply
    90,718.86x = 135,881.37 × 43,873.50
  4. Step 4: Simplify right side
    90,718.86x = 5,961,591,286.70
  5. Step 5: Solve for x
    x = 5,961,591,286.70/90,718.86
  6. Step 6: Final answer
    x = 65,715.02

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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.