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Finding the Fourth Proportional to 71,911.34, 99,241.04 and 40,080.46

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Solution

The fourth proportional to 71,911.34, 99,241.04 and 40,080.46 is: 55,312.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,911.34 : 99,241.04 = 40,080.46 : x
  2. Step 2: Convert to fraction form
    71,911.34/99,241.04 = 40,080.46/x
  3. Step 3: Cross multiply
    71,911.34x = 99,241.04 × 40,080.46
  4. Step 4: Simplify right side
    71,911.34x = 3,977,626,333.68
  5. Step 5: Solve for x
    x = 3,977,626,333.68/71,911.34
  6. Step 6: Final answer
    x = 55,312.93

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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.