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Finding the Fourth Proportional to 67,239.89, 100,859.72 and 20,492.76

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Solution

The fourth proportional to 67,239.89, 100,859.72 and 20,492.76 is: 30,739.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,239.89 : 100,859.72 = 20,492.76 : x
  2. Step 2: Convert to fraction form
    67,239.89/100,859.72 = 20,492.76/x
  3. Step 3: Cross multiply
    67,239.89x = 100,859.72 × 20,492.76
  4. Step 4: Simplify right side
    67,239.89x = 2,066,894,035.63
  5. Step 5: Solve for x
    x = 2,066,894,035.63/67,239.89
  6. Step 6: Final answer
    x = 30,739.11

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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.