Home / 135,176.29-186,566.43-78,620.47

Finding the Fourth Proportional to 135,176.29, 186,566.43 and 78,620.47

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Solution

The fourth proportional to 135,176.29, 186,566.43 and 78,620.47 is: 108,509.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,176.29 : 186,566.43 = 78,620.47 : x
  2. Step 2: Convert to fraction form
    135,176.29/186,566.43 = 78,620.47/x
  3. Step 3: Cross multiply
    135,176.29x = 186,566.43 × 78,620.47
  4. Step 4: Simplify right side
    135,176.29x = 14,667,940,412.82
  5. Step 5: Solve for x
    x = 14,667,940,412.82/135,176.29
  6. Step 6: Final answer
    x = 108,509.71

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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.