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Finding the Fourth Proportional to 45,687.40, 68,535.90 and 14,515.40

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Solution

The fourth proportional to 45,687.40, 68,535.90 and 14,515.40 is: 21,774.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,687.40 : 68,535.90 = 14,515.40 : x
  2. Step 2: Convert to fraction form
    45,687.40/68,535.90 = 14,515.40/x
  3. Step 3: Cross multiply
    45,687.40x = 68,535.90 × 14,515.40
  4. Step 4: Simplify right side
    45,687.40x = 994,826,002.86
  5. Step 5: Solve for x
    x = 994,826,002.86/45,687.40
  6. Step 6: Final answer
    x = 21,774.63

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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.