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Finding the Fourth Proportional to 89,403.80, 134,733.69 and 80,530.25

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Solution

The fourth proportional to 89,403.80, 134,733.69 and 80,530.25 is: 121,361.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,403.80 : 134,733.69 = 80,530.25 : x
  2. Step 2: Convert to fraction form
    89,403.80/134,733.69 = 80,530.25/x
  3. Step 3: Cross multiply
    89,403.80x = 134,733.69 × 80,530.25
  4. Step 4: Simplify right side
    89,403.80x = 10,850,137,065.45
  5. Step 5: Solve for x
    x = 10,850,137,065.45/89,403.80
  6. Step 6: Final answer
    x = 121,361.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.