Home / 135,177.29-186,567.81-78,621.47

Finding the Fourth Proportional to 135,177.29, 186,567.81 and 78,621.47

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Solution

The fourth proportional to 135,177.29, 186,567.81 and 78,621.47 is: 108,511.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,177.29 : 186,567.81 = 78,621.47 : x
  2. Step 2: Convert to fraction form
    135,177.29/186,567.81 = 78,621.47/x
  3. Step 3: Cross multiply
    135,177.29x = 186,567.81 × 78,621.47
  4. Step 4: Simplify right side
    135,177.29x = 14,668,235,476.88
  5. Step 5: Solve for x
    x = 14,668,235,476.88/135,177.29
  6. Step 6: Final answer
    x = 108,511.09

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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.