Home / 100,862.28-139,186.90-55,540.36

Finding the Fourth Proportional to 100,862.28, 139,186.90 and 55,540.36

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Solution

The fourth proportional to 100,862.28, 139,186.90 and 55,540.36 is: 76,644.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,862.28 : 139,186.90 = 55,540.36 : x
  2. Step 2: Convert to fraction form
    100,862.28/139,186.90 = 55,540.36/x
  3. Step 3: Cross multiply
    100,862.28x = 139,186.90 × 55,540.36
  4. Step 4: Simplify right side
    100,862.28x = 7,730,490,533.28
  5. Step 5: Solve for x
    x = 7,730,490,533.28/100,862.28
  6. Step 6: Final answer
    x = 76,644.02

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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.