Home / 87,173.64-120,255-56,976.66

Finding the Fourth Proportional to 87,173.64, 120,255 and 56,976.66

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Solution

The fourth proportional to 87,173.64, 120,255 and 56,976.66 is: 78,598.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,173.64 : 120,255 = 56,976.66 : x
  2. Step 2: Convert to fraction form
    87,173.64/120,255 = 56,976.66/x
  3. Step 3: Cross multiply
    87,173.64x = 120,255 × 56,976.66
  4. Step 4: Simplify right side
    87,173.64x = 6,851,728,248.30
  5. Step 5: Solve for x
    x = 6,851,728,248.30/87,173.64
  6. Step 6: Final answer
    x = 78,598.63

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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.