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Finding the Fourth Proportional to 71,224.29, 98,281.08 and 39,388.86

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Solution

The fourth proportional to 71,224.29, 98,281.08 and 39,388.86 is: 54,351.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,224.29 : 98,281.08 = 39,388.86 : x
  2. Step 2: Convert to fraction form
    71,224.29/98,281.08 = 39,388.86/x
  3. Step 3: Cross multiply
    71,224.29x = 98,281.08 × 39,388.86
  4. Step 4: Simplify right side
    71,224.29x = 3,871,179,700.77
  5. Step 5: Solve for x
    x = 3,871,179,700.77/71,224.29
  6. Step 6: Final answer
    x = 54,351.96

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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.