Home / 268,121.88-402,238.08-78,588.45

Finding the Fourth Proportional to 268,121.88, 402,238.08 and 78,588.45

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Solution

The fourth proportional to 268,121.88, 402,238.08 and 78,588.45 is: 117,898.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,121.88 : 402,238.08 = 78,588.45 : x
  2. Step 2: Convert to fraction form
    268,121.88/402,238.08 = 78,588.45/x
  3. Step 3: Cross multiply
    268,121.88x = 402,238.08 × 78,588.45
  4. Step 4: Simplify right side
    268,121.88x = 31,611,267,238.18
  5. Step 5: Solve for x
    x = 31,611,267,238.18/268,121.88
  6. Step 6: Final answer
    x = 117,898.87

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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.