Home / 420,064.20-629,878.70-124,537.80

Finding the Fourth Proportional to 420,064.20, 629,878.70 and 124,537.80

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Solution

The fourth proportional to 420,064.20, 629,878.70 and 124,537.80 is: 186,742.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,064.20 : 629,878.70 = 124,537.80 : x
  2. Step 2: Convert to fraction form
    420,064.20/629,878.70 = 124,537.80/x
  3. Step 3: Cross multiply
    420,064.20x = 629,878.70 × 124,537.80
  4. Step 4: Simplify right side
    420,064.20x = 78,443,707,564.86
  5. Step 5: Solve for x
    x = 78,443,707,564.86/420,064.20
  6. Step 6: Final answer
    x = 186,742.19

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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.