Home / 100,118.54-138,194.34-57,705.30

Finding the Fourth Proportional to 100,118.54, 138,194.34 and 57,705.30

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Solution

The fourth proportional to 100,118.54, 138,194.34 and 57,705.30 is: 79,651.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,118.54 : 138,194.34 = 57,705.30 : x
  2. Step 2: Convert to fraction form
    100,118.54/138,194.34 = 57,705.30/x
  3. Step 3: Cross multiply
    100,118.54x = 138,194.34 × 57,705.30
  4. Step 4: Simplify right side
    100,118.54x = 7,974,545,848.00
  5. Step 5: Solve for x
    x = 7,974,545,848.00/100,118.54
  6. Step 6: Final answer
    x = 79,651.04

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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.