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Finding the Fourth Proportional to 108,361.77, 149,473.85 and 71,568.21

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Solution

The fourth proportional to 108,361.77, 149,473.85 and 71,568.21 is: 98,720.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,361.77 : 149,473.85 = 71,568.21 : x
  2. Step 2: Convert to fraction form
    108,361.77/149,473.85 = 71,568.21/x
  3. Step 3: Cross multiply
    108,361.77x = 149,473.85 × 71,568.21
  4. Step 4: Simplify right side
    108,361.77x = 10,697,575,528.47
  5. Step 5: Solve for x
    x = 10,697,575,528.47/108,361.77
  6. Step 6: Final answer
    x = 98,720.94

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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.