Home / 83,615.42-125,422.64-20,435.87

Finding the Fourth Proportional to 83,615.42, 125,422.64 and 20,435.87

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Solution

The fourth proportional to 83,615.42, 125,422.64 and 20,435.87 is: 30,653.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,615.42 : 125,422.64 = 20,435.87 : x
  2. Step 2: Convert to fraction form
    83,615.42/125,422.64 = 20,435.87/x
  3. Step 3: Cross multiply
    83,615.42x = 125,422.64 × 20,435.87
  4. Step 4: Simplify right side
    83,615.42x = 2,563,120,663.92
  5. Step 5: Solve for x
    x = 2,563,120,663.92/83,615.42
  6. Step 6: Final answer
    x = 30,653.69

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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.