Home / 100,418.48-138,577.08-55,706.48

Finding the Fourth Proportional to 100,418.48, 138,577.08 and 55,706.48

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Solution

The fourth proportional to 100,418.48, 138,577.08 and 55,706.48 is: 76,874.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,418.48 : 138,577.08 = 55,706.48 : x
  2. Step 2: Convert to fraction form
    100,418.48/138,577.08 = 55,706.48/x
  3. Step 3: Cross multiply
    100,418.48x = 138,577.08 × 55,706.48
  4. Step 4: Simplify right side
    100,418.48x = 7,719,641,335.48
  5. Step 5: Solve for x
    x = 7,719,641,335.48/100,418.48
  6. Step 6: Final answer
    x = 76,874.71

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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.