Home / 100,426.29-138,583.65-55,103.16

Finding the Fourth Proportional to 100,426.29, 138,583.65 and 55,103.16

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Solution

The fourth proportional to 100,426.29, 138,583.65 and 55,103.16 is: 76,039.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,426.29 : 138,583.65 = 55,103.16 : x
  2. Step 2: Convert to fraction form
    100,426.29/138,583.65 = 55,103.16/x
  3. Step 3: Cross multiply
    100,426.29x = 138,583.65 × 55,103.16
  4. Step 4: Simplify right side
    100,426.29x = 7,636,397,039.33
  5. Step 5: Solve for x
    x = 7,636,397,039.33/100,426.29
  6. Step 6: Final answer
    x = 76,039.82

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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.