Home / 103,730.29-143,138.70-57,786.55

Finding the Fourth Proportional to 103,730.29, 143,138.70 and 57,786.55

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Solution

The fourth proportional to 103,730.29, 143,138.70 and 57,786.55 is: 79,740.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,730.29 : 143,138.70 = 57,786.55 : x
  2. Step 2: Convert to fraction form
    103,730.29/143,138.70 = 57,786.55/x
  3. Step 3: Cross multiply
    103,730.29x = 143,138.70 × 57,786.55
  4. Step 4: Simplify right side
    103,730.29x = 8,271,491,286.64
  5. Step 5: Solve for x
    x = 8,271,491,286.64/103,730.29
  6. Step 6: Final answer
    x = 79,740.37

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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.