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Finding the Fourth Proportional to 84,087.63, 126,162.21 and 39,130.44

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Solution

The fourth proportional to 84,087.63, 126,162.21 and 39,130.44 is: 58,709.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,087.63 : 126,162.21 = 39,130.44 : x
  2. Step 2: Convert to fraction form
    84,087.63/126,162.21 = 39,130.44/x
  3. Step 3: Cross multiply
    84,087.63x = 126,162.21 × 39,130.44
  4. Step 4: Simplify right side
    84,087.63x = 4,936,782,788.67
  5. Step 5: Solve for x
    x = 4,936,782,788.67/84,087.63
  6. Step 6: Final answer
    x = 58,709.98

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1.5x scale

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.