Home / 80,645.25-120,988.26-56,999.28

Finding the Fourth Proportional to 80,645.25, 120,988.26 and 56,999.28

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Solution

The fourth proportional to 80,645.25, 120,988.26 and 56,999.28 is: 85,513.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,645.25 : 120,988.26 = 56,999.28 : x
  2. Step 2: Convert to fraction form
    80,645.25/120,988.26 = 56,999.28/x
  3. Step 3: Cross multiply
    80,645.25x = 120,988.26 × 56,999.28
  4. Step 4: Simplify right side
    80,645.25x = 6,896,243,708.45
  5. Step 5: Solve for x
    x = 6,896,243,708.45/80,645.25
  6. Step 6: Final answer
    x = 85,513.33

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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.