Home / 80,956.45-121,432.85-21,792.84

Finding the Fourth Proportional to 80,956.45, 121,432.85 and 21,792.84

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Solution

The fourth proportional to 80,956.45, 121,432.85 and 21,792.84 is: 32,688.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,956.45 : 121,432.85 = 21,792.84 : x
  2. Step 2: Convert to fraction form
    80,956.45/121,432.85 = 21,792.84/x
  3. Step 3: Cross multiply
    80,956.45x = 121,432.85 × 21,792.84
  4. Step 4: Simplify right side
    80,956.45x = 2,646,366,670.79
  5. Step 5: Solve for x
    x = 2,646,366,670.79/80,956.45
  6. Step 6: Final answer
    x = 32,688.77

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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.