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Finding the Fourth Proportional to 149,788.58, 206,709.45 and 82,720.58

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Solution

The fourth proportional to 149,788.58, 206,709.45 and 82,720.58 is: 114,155.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,788.58 : 206,709.45 = 82,720.58 : x
  2. Step 2: Convert to fraction form
    149,788.58/206,709.45 = 82,720.58/x
  3. Step 3: Cross multiply
    149,788.58x = 206,709.45 × 82,720.58
  4. Step 4: Simplify right side
    149,788.58x = 17,099,125,595.48
  5. Step 5: Solve for x
    x = 17,099,125,595.48/149,788.58
  6. Step 6: Final answer
    x = 114,155.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.