Home / 100,678.04-138,932.82-55,355.96

Finding the Fourth Proportional to 100,678.04, 138,932.82 and 55,355.96

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Solution

The fourth proportional to 100,678.04, 138,932.82 and 55,355.96 is: 76,389.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,678.04 : 138,932.82 = 55,355.96 : x
  2. Step 2: Convert to fraction form
    100,678.04/138,932.82 = 55,355.96/x
  3. Step 3: Cross multiply
    100,678.04x = 138,932.82 × 55,355.96
  4. Step 4: Simplify right side
    100,678.04x = 7,690,759,626.61
  5. Step 5: Solve for x
    x = 7,690,759,626.61/100,678.04
  6. Step 6: Final answer
    x = 76,389.64

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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.