Home / 128,625.12-192,965.40-39,876.84

Finding the Fourth Proportional to 128,625.12, 192,965.40 and 39,876.84

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Solution

The fourth proportional to 128,625.12, 192,965.40 and 39,876.84 is: 59,823.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,625.12 : 192,965.40 = 39,876.84 : x
  2. Step 2: Convert to fraction form
    128,625.12/192,965.40 = 39,876.84/x
  3. Step 3: Cross multiply
    128,625.12x = 192,965.40 × 39,876.84
  4. Step 4: Simplify right side
    128,625.12x = 7,694,850,381.34
  5. Step 5: Solve for x
    x = 7,694,850,381.34/128,625.12
  6. Step 6: Final answer
    x = 59,823.85

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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.