Home / 385,961.40-578,942.10-136,668.60

Finding the Fourth Proportional to 385,961.40, 578,942.10 and 136,668.60

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Solution

The fourth proportional to 385,961.40, 578,942.10 and 136,668.60 is: 205,002.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,961.40 : 578,942.10 = 136,668.60 : x
  2. Step 2: Convert to fraction form
    385,961.40/578,942.10 = 136,668.60/x
  3. Step 3: Cross multiply
    385,961.40x = 578,942.10 × 136,668.60
  4. Step 4: Simplify right side
    385,961.40x = 79,123,206,288.06
  5. Step 5: Solve for x
    x = 79,123,206,288.06/385,961.40
  6. Step 6: Final answer
    x = 205,002.90

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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.