Home / 259,370.12-388,909.26-81,844.04

Finding the Fourth Proportional to 259,370.12, 388,909.26 and 81,844.04

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Solution

The fourth proportional to 259,370.12, 388,909.26 and 81,844.04 is: 122,720.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,370.12 : 388,909.26 = 81,844.04 : x
  2. Step 2: Convert to fraction form
    259,370.12/388,909.26 = 81,844.04/x
  3. Step 3: Cross multiply
    259,370.12x = 388,909.26 × 81,844.04
  4. Step 4: Simplify right side
    259,370.12x = 31,829,905,031.81
  5. Step 5: Solve for x
    x = 31,829,905,031.81/259,370.12
  6. Step 6: Final answer
    x = 122,720.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.