Home / 81,799.08-122,680.38-31,880.52

Finding the Fourth Proportional to 81,799.08, 122,680.38 and 31,880.52

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Solution

The fourth proportional to 81,799.08, 122,680.38 and 31,880.52 is: 47,813.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,799.08 : 122,680.38 = 31,880.52 : x
  2. Step 2: Convert to fraction form
    81,799.08/122,680.38 = 31,880.52/x
  3. Step 3: Cross multiply
    81,799.08x = 122,680.38 × 31,880.52
  4. Step 4: Simplify right side
    81,799.08x = 3,911,114,308.20
  5. Step 5: Solve for x
    x = 3,911,114,308.20/81,799.08
  6. Step 6: Final answer
    x = 47,813.67

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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.