Home / 87,128.06-120,218.40-56,957.60

Finding the Fourth Proportional to 87,128.06, 120,218.40 and 56,957.60

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Solution

The fourth proportional to 87,128.06, 120,218.40 and 56,957.60 is: 78,589.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,128.06 : 120,218.40 = 56,957.60 : x
  2. Step 2: Convert to fraction form
    87,128.06/120,218.40 = 56,957.60/x
  3. Step 3: Cross multiply
    87,128.06x = 120,218.40 × 56,957.60
  4. Step 4: Simplify right side
    87,128.06x = 6,847,351,539.84
  5. Step 5: Solve for x
    x = 6,847,351,539.84/87,128.06
  6. Step 6: Final answer
    x = 78,589.51

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1.5x scale

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.