Home / 420,686.50-631,029.76-125,198.50

Finding the Fourth Proportional to 420,686.50, 631,029.76 and 125,198.50

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Solution

The fourth proportional to 420,686.50, 631,029.76 and 125,198.50 is: 187,797.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,686.50 : 631,029.76 = 125,198.50 : x
  2. Step 2: Convert to fraction form
    420,686.50/631,029.76 = 125,198.50/x
  3. Step 3: Cross multiply
    420,686.50x = 631,029.76 × 125,198.50
  4. Step 4: Simplify right side
    420,686.50x = 79,003,979,407.36
  5. Step 5: Solve for x
    x = 79,003,979,407.36/420,686.50
  6. Step 6: Final answer
    x = 187,797.75

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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.