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Finding the Fourth Proportional to 72,486.29, 100,027.91 and 43,812.90

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Solution

The fourth proportional to 72,486.29, 100,027.91 and 43,812.90 is: 60,459.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,486.29 : 100,027.91 = 43,812.90 : x
  2. Step 2: Convert to fraction form
    72,486.29/100,027.91 = 43,812.90/x
  3. Step 3: Cross multiply
    72,486.29x = 100,027.91 × 43,812.90
  4. Step 4: Simplify right side
    72,486.29x = 4,382,512,927.57
  5. Step 5: Solve for x
    x = 4,382,512,927.57/72,486.29
  6. Step 6: Final answer
    x = 60,459.89

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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.