Home / 100,398.24-138,550.64-55,076.31

Finding the Fourth Proportional to 100,398.24, 138,550.64 and 55,076.31

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Solution

The fourth proportional to 100,398.24, 138,550.64 and 55,076.31 is: 76,005.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,398.24 : 138,550.64 = 55,076.31 : x
  2. Step 2: Convert to fraction form
    100,398.24/138,550.64 = 55,076.31/x
  3. Step 3: Cross multiply
    100,398.24x = 138,550.64 × 55,076.31
  4. Step 4: Simplify right side
    100,398.24x = 7,630,857,999.34
  5. Step 5: Solve for x
    x = 7,630,857,999.34/100,398.24
  6. Step 6: Final answer
    x = 76,005.89

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1.5x scale

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.