Home / 71,669.66-98,905.31-39,405.64

Finding the Fourth Proportional to 71,669.66, 98,905.31 and 39,405.64

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Solution

The fourth proportional to 71,669.66, 98,905.31 and 39,405.64 is: 54,380.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,669.66 : 98,905.31 = 39,405.64 : x
  2. Step 2: Convert to fraction form
    71,669.66/98,905.31 = 39,405.64/x
  3. Step 3: Cross multiply
    71,669.66x = 98,905.31 × 39,405.64
  4. Step 4: Simplify right side
    71,669.66x = 3,897,427,039.95
  5. Step 5: Solve for x
    x = 3,897,427,039.95/71,669.66
  6. Step 6: Final answer
    x = 54,380.43

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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.