Home / 78,374.20-117,569.49-25,787.83

Finding the Fourth Proportional to 78,374.20, 117,569.49 and 25,787.83

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Solution

The fourth proportional to 78,374.20, 117,569.49 and 25,787.83 is: 38,684.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,374.20 : 117,569.49 = 25,787.83 : x
  2. Step 2: Convert to fraction form
    78,374.20/117,569.49 = 25,787.83/x
  3. Step 3: Cross multiply
    78,374.20x = 117,569.49 × 25,787.83
  4. Step 4: Simplify right side
    78,374.20x = 3,031,862,021.31
  5. Step 5: Solve for x
    x = 3,031,862,021.31/78,374.20
  6. Step 6: Final answer
    x = 38,684.44

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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.