Home / 87,985.38-131,976.70-21,425.40

Finding the Fourth Proportional to 87,985.38, 131,976.70 and 21,425.40

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Solution

The fourth proportional to 87,985.38, 131,976.70 and 21,425.40 is: 32,137.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,985.38 : 131,976.70 = 21,425.40 : x
  2. Step 2: Convert to fraction form
    87,985.38/131,976.70 = 21,425.40/x
  3. Step 3: Cross multiply
    87,985.38x = 131,976.70 × 21,425.40
  4. Step 4: Simplify right side
    87,985.38x = 2,827,653,588.18
  5. Step 5: Solve for x
    x = 2,827,653,588.18/87,985.38
  6. Step 6: Final answer
    x = 32,137.77

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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.