Home / 87,008.63-120,129.82-66,829.50

Finding the Fourth Proportional to 87,008.63, 120,129.82 and 66,829.50

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Solution

The fourth proportional to 87,008.63, 120,129.82 and 66,829.50 is: 92,269.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,008.63 : 120,129.82 = 66,829.50 : x
  2. Step 2: Convert to fraction form
    87,008.63/120,129.82 = 66,829.50/x
  3. Step 3: Cross multiply
    87,008.63x = 120,129.82 × 66,829.50
  4. Step 4: Simplify right side
    87,008.63x = 8,028,215,638.62
  5. Step 5: Solve for x
    x = 8,028,215,638.62/87,008.63
  6. Step 6: Final answer
    x = 92,269.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.