Home / 100,698.02-138,964.15-54,757.81

Finding the Fourth Proportional to 100,698.02, 138,964.15 and 54,757.81

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Solution

The fourth proportional to 100,698.02, 138,964.15 and 54,757.81 is: 75,566.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,698.02 : 138,964.15 = 54,757.81 : x
  2. Step 2: Convert to fraction form
    100,698.02/138,964.15 = 54,757.81/x
  3. Step 3: Cross multiply
    100,698.02x = 138,964.15 × 54,757.81
  4. Step 4: Simplify right side
    100,698.02x = 7,609,372,764.66
  5. Step 5: Solve for x
    x = 7,609,372,764.66/100,698.02
  6. Step 6: Final answer
    x = 75,566.26

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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.