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Finding the Fourth Proportional to 72,666.90, 109,000.17 and 20,076.21

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Solution

The fourth proportional to 72,666.90, 109,000.17 and 20,076.21 is: 30,114.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,666.90 : 109,000.17 = 20,076.21 : x
  2. Step 2: Convert to fraction form
    72,666.90/109,000.17 = 20,076.21/x
  3. Step 3: Cross multiply
    72,666.90x = 109,000.17 × 20,076.21
  4. Step 4: Simplify right side
    72,666.90x = 2,188,310,302.96
  5. Step 5: Solve for x
    x = 2,188,310,302.96/72,666.90
  6. Step 6: Final answer
    x = 30,114.27

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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.