Home / 87,990.83-131,986.48-21,430.83

Finding the Fourth Proportional to 87,990.83, 131,986.48 and 21,430.83

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Solution

The fourth proportional to 87,990.83, 131,986.48 and 21,430.83 is: 32,146.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,990.83 : 131,986.48 = 21,430.83 : x
  2. Step 2: Convert to fraction form
    87,990.83/131,986.48 = 21,430.83/x
  3. Step 3: Cross multiply
    87,990.83x = 131,986.48 × 21,430.83
  4. Step 4: Simplify right side
    87,990.83x = 2,828,579,815.18
  5. Step 5: Solve for x
    x = 2,828,579,815.18/87,990.83
  6. Step 6: Final answer
    x = 32,146.30

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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.