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Finding the Fourth Proportional to 80,349.44, 120,510.45 and 21,185.69

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Solution

The fourth proportional to 80,349.44, 120,510.45 and 21,185.69 is: 31,774.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,349.44 : 120,510.45 = 21,185.69 : x
  2. Step 2: Convert to fraction form
    80,349.44/120,510.45 = 21,185.69/x
  3. Step 3: Cross multiply
    80,349.44x = 120,510.45 × 21,185.69
  4. Step 4: Simplify right side
    80,349.44x = 2,553,096,432.91
  5. Step 5: Solve for x
    x = 2,553,096,432.91/80,349.44
  6. Step 6: Final answer
    x = 31,774.91

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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.