Home / 103,772.88-143,240.40-76,906.80

Finding the Fourth Proportional to 103,772.88, 143,240.40 and 76,906.80

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Solution

The fourth proportional to 103,772.88, 143,240.40 and 76,906.80 is: 106,156.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,772.88 : 143,240.40 = 76,906.80 : x
  2. Step 2: Convert to fraction form
    103,772.88/143,240.40 = 76,906.80/x
  3. Step 3: Cross multiply
    103,772.88x = 143,240.40 × 76,906.80
  4. Step 4: Simplify right side
    103,772.88x = 11,016,160,794.72
  5. Step 5: Solve for x
    x = 11,016,160,794.72/103,772.88
  6. Step 6: Final answer
    x = 106,156.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.