Home / 87,726.21-131,588.08-21,165.78

Finding the Fourth Proportional to 87,726.21, 131,588.08 and 21,165.78

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Solution

The fourth proportional to 87,726.21, 131,588.08 and 21,165.78 is: 31,748.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,726.21 : 131,588.08 = 21,165.78 : x
  2. Step 2: Convert to fraction form
    87,726.21/131,588.08 = 21,165.78/x
  3. Step 3: Cross multiply
    87,726.21x = 131,588.08 × 21,165.78
  4. Step 4: Simplify right side
    87,726.21x = 2,785,163,693.96
  5. Step 5: Solve for x
    x = 2,785,163,693.96/87,726.21
  6. Step 6: Final answer
    x = 31,748.37

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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.