Home / 87,122.75-120,185.12-56,925.75

Finding the Fourth Proportional to 87,122.75, 120,185.12 and 56,925.75

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Solution

The fourth proportional to 87,122.75, 120,185.12 and 56,925.75 is: 78,528.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,122.75 : 120,185.12 = 56,925.75 : x
  2. Step 2: Convert to fraction form
    87,122.75/120,185.12 = 56,925.75/x
  3. Step 3: Cross multiply
    87,122.75x = 120,185.12 × 56,925.75
  4. Step 4: Simplify right side
    87,122.75x = 6,841,628,094.84
  5. Step 5: Solve for x
    x = 6,841,628,094.84/87,122.75
  6. Step 6: Final answer
    x = 78,528.61

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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.