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Finding the Fourth Proportional to 72,486.80, 100,028.60 and 43,813.40

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Solution

The fourth proportional to 72,486.80, 100,028.60 and 43,813.40 is: 60,460.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,486.80 : 100,028.60 = 43,813.40 : x
  2. Step 2: Convert to fraction form
    72,486.80/100,028.60 = 43,813.40/x
  3. Step 3: Cross multiply
    72,486.80x = 100,028.60 × 43,813.40
  4. Step 4: Simplify right side
    72,486.80x = 4,382,593,063.24
  5. Step 5: Solve for x
    x = 4,382,593,063.24/72,486.80
  6. Step 6: Final answer
    x = 60,460.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.