Home / 100,389.41-138,562.59-68,178.54

Finding the Fourth Proportional to 100,389.41, 138,562.59 and 68,178.54

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Solution

The fourth proportional to 100,389.41, 138,562.59 and 68,178.54 is: 94,103.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,389.41 : 138,562.59 = 68,178.54 : x
  2. Step 2: Convert to fraction form
    100,389.41/138,562.59 = 68,178.54/x
  3. Step 3: Cross multiply
    100,389.41x = 138,562.59 × 68,178.54
  4. Step 4: Simplify right side
    100,389.41x = 9,446,995,084.82
  5. Step 5: Solve for x
    x = 9,446,995,084.82/100,389.41
  6. Step 6: Final answer
    x = 94,103.50

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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.