Home / 109,915.20-164,799.90-39,785.40

Finding the Fourth Proportional to 109,915.20, 164,799.90 and 39,785.40

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Solution

The fourth proportional to 109,915.20, 164,799.90 and 39,785.40 is: 59,651.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,915.20 : 164,799.90 = 39,785.40 : x
  2. Step 2: Convert to fraction form
    109,915.20/164,799.90 = 39,785.40/x
  3. Step 3: Cross multiply
    109,915.20x = 164,799.90 × 39,785.40
  4. Step 4: Simplify right side
    109,915.20x = 6,556,629,941.46
  5. Step 5: Solve for x
    x = 6,556,629,941.46/109,915.20
  6. Step 6: Final answer
    x = 59,651.71

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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.