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Finding the Fourth Proportional to 84,000.63, 125,999.46 and 20,820.63

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Solution

The fourth proportional to 84,000.63, 125,999.46 and 20,820.63 is: 31,230.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,000.63 : 125,999.46 = 20,820.63 : x
  2. Step 2: Convert to fraction form
    84,000.63/125,999.46 = 20,820.63/x
  3. Step 3: Cross multiply
    84,000.63x = 125,999.46 × 20,820.63
  4. Step 4: Simplify right side
    84,000.63x = 2,623,388,136.86
  5. Step 5: Solve for x
    x = 2,623,388,136.86/84,000.63
  6. Step 6: Final answer
    x = 31,230.58

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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.