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Finding the Fourth Proportional to 87,784.70, 131,690.81 and 28,606.70

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Solution

The fourth proportional to 87,784.70, 131,690.81 and 28,606.70 is: 42,914.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,784.70 : 131,690.81 = 28,606.70 : x
  2. Step 2: Convert to fraction form
    87,784.70/131,690.81 = 28,606.70/x
  3. Step 3: Cross multiply
    87,784.70x = 131,690.81 × 28,606.70
  4. Step 4: Simplify right side
    87,784.70x = 3,767,239,895.17
  5. Step 5: Solve for x
    x = 3,767,239,895.17/87,784.70
  6. Step 6: Final answer
    x = 42,914.54

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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.