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Finding the Fourth Proportional to 71,225.44, 98,282.48 and 39,390

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Solution

The fourth proportional to 71,225.44, 98,282.48 and 39,390 is: 54,353.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,225.44 : 98,282.48 = 39,390 : x
  2. Step 2: Convert to fraction form
    71,225.44/98,282.48 = 39,390/x
  3. Step 3: Cross multiply
    71,225.44x = 98,282.48 × 39,390
  4. Step 4: Simplify right side
    71,225.44x = 3,871,346,887.20
  5. Step 5: Solve for x
    x = 3,871,346,887.20/71,225.44
  6. Step 6: Final answer
    x = 54,353.43

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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.