Home / 100,278.96-138,388.80-57,265.47

Finding the Fourth Proportional to 100,278.96, 138,388.80 and 57,265.47

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Solution

The fourth proportional to 100,278.96, 138,388.80 and 57,265.47 is: 79,028.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,278.96 : 138,388.80 = 57,265.47 : x
  2. Step 2: Convert to fraction form
    100,278.96/138,388.80 = 57,265.47/x
  3. Step 3: Cross multiply
    100,278.96x = 138,388.80 × 57,265.47
  4. Step 4: Simplify right side
    100,278.96x = 7,924,899,674.74
  5. Step 5: Solve for x
    x = 7,924,899,674.74/100,278.96
  6. Step 6: Final answer
    x = 79,028.54

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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.