Home / 87,939.51-131,908.12-21,379.45

Finding the Fourth Proportional to 87,939.51, 131,908.12 and 21,379.45

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Solution

The fourth proportional to 87,939.51, 131,908.12 and 21,379.45 is: 32,068.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,939.51 : 131,908.12 = 21,379.45 : x
  2. Step 2: Convert to fraction form
    87,939.51/131,908.12 = 21,379.45/x
  3. Step 3: Cross multiply
    87,939.51x = 131,908.12 × 21,379.45
  4. Step 4: Simplify right side
    87,939.51x = 2,820,123,056.13
  5. Step 5: Solve for x
    x = 2,820,123,056.13/87,939.51
  6. Step 6: Final answer
    x = 32,068.90

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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.