Home / 100,540.24-138,728.94-58,102.72

Finding the Fourth Proportional to 100,540.24, 138,728.94 and 58,102.72

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Solution

The fourth proportional to 100,540.24, 138,728.94 and 58,102.72 is: 80,172.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,540.24 : 138,728.94 = 58,102.72 : x
  2. Step 2: Convert to fraction form
    100,540.24/138,728.94 = 58,102.72/x
  3. Step 3: Cross multiply
    100,540.24x = 138,728.94 × 58,102.72
  4. Step 4: Simplify right side
    100,540.24x = 8,060,528,756.72
  5. Step 5: Solve for x
    x = 8,060,528,756.72/100,540.24
  6. Step 6: Final answer
    x = 80,172.17

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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.