Home / 78,458.83-117,687.70-25,872.55

Finding the Fourth Proportional to 78,458.83, 117,687.70 and 25,872.55

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Solution

The fourth proportional to 78,458.83, 117,687.70 and 25,872.55 is: 38,808.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,458.83 : 117,687.70 = 25,872.55 : x
  2. Step 2: Convert to fraction form
    78,458.83/117,687.70 = 25,872.55/x
  3. Step 3: Cross multiply
    78,458.83x = 117,687.70 × 25,872.55
  4. Step 4: Simplify right side
    78,458.83x = 3,044,880,902.64
  5. Step 5: Solve for x
    x = 3,044,880,902.64/78,458.83
  6. Step 6: Final answer
    x = 38,808.65

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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.