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Finding the Fourth Proportional to 101,920.88, 140,652.67 and 55,980.21

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Solution

The fourth proportional to 101,920.88, 140,652.67 and 55,980.21 is: 77,253.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,920.88 : 140,652.67 = 55,980.21 : x
  2. Step 2: Convert to fraction form
    101,920.88/140,652.67 = 55,980.21/x
  3. Step 3: Cross multiply
    101,920.88x = 140,652.67 × 55,980.21
  4. Step 4: Simplify right side
    101,920.88x = 7,873,766,496.12
  5. Step 5: Solve for x
    x = 7,873,766,496.12/101,920.88
  6. Step 6: Final answer
    x = 77,253.71

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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.