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Finding the Fourth Proportional to 71,129.21, 98,157.03 and 39,300.26

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Solution

The fourth proportional to 71,129.21, 98,157.03 and 39,300.26 is: 54,233.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,129.21 : 98,157.03 = 39,300.26 : x
  2. Step 2: Convert to fraction form
    71,129.21/98,157.03 = 39,300.26/x
  3. Step 3: Cross multiply
    71,129.21x = 98,157.03 × 39,300.26
  4. Step 4: Simplify right side
    71,129.21x = 3,857,596,799.83
  5. Step 5: Solve for x
    x = 3,857,596,799.83/71,129.21
  6. Step 6: Final answer
    x = 54,233.65

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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.