Home / 100,664.30-138,913.19-55,341.95

Finding the Fourth Proportional to 100,664.30, 138,913.19 and 55,341.95

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Solution

The fourth proportional to 100,664.30, 138,913.19 and 55,341.95 is: 76,369.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,664.30 : 138,913.19 = 55,341.95 : x
  2. Step 2: Convert to fraction form
    100,664.30/138,913.19 = 55,341.95/x
  3. Step 3: Cross multiply
    100,664.30x = 138,913.19 × 55,341.95
  4. Step 4: Simplify right side
    100,664.30x = 7,687,726,815.32
  5. Step 5: Solve for x
    x = 7,687,726,815.32/100,664.30
  6. Step 6: Final answer
    x = 76,369.95

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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.