Home / 100,479.42-138,652.91-55,157.24

Finding the Fourth Proportional to 100,479.42, 138,652.91 and 55,157.24

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Solution

The fourth proportional to 100,479.42, 138,652.91 and 55,157.24 is: 76,112.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,479.42 : 138,652.91 = 55,157.24 : x
  2. Step 2: Convert to fraction form
    100,479.42/138,652.91 = 55,157.24/x
  3. Step 3: Cross multiply
    100,479.42x = 138,652.91 × 55,157.24
  4. Step 4: Simplify right side
    100,479.42x = 7,647,710,864.52
  5. Step 5: Solve for x
    x = 7,647,710,864.52/100,479.42
  6. Step 6: Final answer
    x = 76,112.21

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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.