Home / 80,592.96-120,889.28-21,428.64

Finding the Fourth Proportional to 80,592.96, 120,889.28 and 21,428.64

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Solution

The fourth proportional to 80,592.96, 120,889.28 and 21,428.64 is: 32,142.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,592.96 : 120,889.28 = 21,428.64 : x
  2. Step 2: Convert to fraction form
    80,592.96/120,889.28 = 21,428.64/x
  3. Step 3: Cross multiply
    80,592.96x = 120,889.28 × 21,428.64
  4. Step 4: Simplify right side
    80,592.96x = 2,590,492,860.98
  5. Step 5: Solve for x
    x = 2,590,492,860.98/80,592.96
  6. Step 6: Final answer
    x = 32,142.92

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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.