Home / 78,439.40-117,633.82-25,836.36

Finding the Fourth Proportional to 78,439.40, 117,633.82 and 25,836.36

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Solution

The fourth proportional to 78,439.40, 117,633.82 and 25,836.36 is: 38,746.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,439.40 : 117,633.82 = 25,836.36 : x
  2. Step 2: Convert to fraction form
    78,439.40/117,633.82 = 25,836.36/x
  3. Step 3: Cross multiply
    78,439.40x = 117,633.82 × 25,836.36
  4. Step 4: Simplify right side
    78,439.40x = 3,039,229,721.70
  5. Step 5: Solve for x
    x = 3,039,229,721.70/78,439.40
  6. Step 6: Final answer
    x = 38,746.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.