Home / 100,621.96-138,851.58-55,298.96

Finding the Fourth Proportional to 100,621.96, 138,851.58 and 55,298.96

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Solution

The fourth proportional to 100,621.96, 138,851.58 and 55,298.96 is: 76,308.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,621.96 : 138,851.58 = 55,298.96 : x
  2. Step 2: Convert to fraction form
    100,621.96/138,851.58 = 55,298.96/x
  3. Step 3: Cross multiply
    100,621.96x = 138,851.58 × 55,298.96
  4. Step 4: Simplify right side
    100,621.96x = 7,678,347,968.36
  5. Step 5: Solve for x
    x = 7,678,347,968.36/100,621.96
  6. Step 6: Final answer
    x = 76,308.87

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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.