Home / 100,420.52-138,575.64-55,097.48

Finding the Fourth Proportional to 100,420.52, 138,575.64 and 55,097.48

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Solution

The fourth proportional to 100,420.52, 138,575.64 and 55,097.48 is: 76,031.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,420.52 : 138,575.64 = 55,097.48 : x
  2. Step 2: Convert to fraction form
    100,420.52/138,575.64 = 55,097.48/x
  3. Step 3: Cross multiply
    100,420.52x = 138,575.64 × 55,097.48
  4. Step 4: Simplify right side
    100,420.52x = 7,635,168,553.39
  5. Step 5: Solve for x
    x = 7,635,168,553.39/100,420.52
  6. Step 6: Final answer
    x = 76,031.96

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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.