Home / 79,884.28-119,829.48-20,718.40

Finding the Fourth Proportional to 79,884.28, 119,829.48 and 20,718.40

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Solution

The fourth proportional to 79,884.28, 119,829.48 and 20,718.40 is: 31,078.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,884.28 : 119,829.48 = 20,718.40 : x
  2. Step 2: Convert to fraction form
    79,884.28/119,829.48 = 20,718.40/x
  3. Step 3: Cross multiply
    79,884.28x = 119,829.48 × 20,718.40
  4. Step 4: Simplify right side
    79,884.28x = 2,482,675,098.43
  5. Step 5: Solve for x
    x = 2,482,675,098.43/79,884.28
  6. Step 6: Final answer
    x = 31,078.39

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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.