Home / 76,916.59-115,369.41-20,759.89

Finding the Fourth Proportional to 76,916.59, 115,369.41 and 20,759.89

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Solution

The fourth proportional to 76,916.59, 115,369.41 and 20,759.89 is: 31,138.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,916.59 : 115,369.41 = 20,759.89 : x
  2. Step 2: Convert to fraction form
    76,916.59/115,369.41 = 20,759.89/x
  3. Step 3: Cross multiply
    76,916.59x = 115,369.41 × 20,759.89
  4. Step 4: Simplify right side
    76,916.59x = 2,395,056,157.17
  5. Step 5: Solve for x
    x = 2,395,056,157.17/76,916.59
  6. Step 6: Final answer
    x = 31,138.36

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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.