Home / 135,379.18-186,842.82-78,007.51

Finding the Fourth Proportional to 135,379.18, 186,842.82 and 78,007.51

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Solution

The fourth proportional to 135,379.18, 186,842.82 and 78,007.51 is: 107,661.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,379.18 : 186,842.82 = 78,007.51 : x
  2. Step 2: Convert to fraction form
    135,379.18/186,842.82 = 78,007.51/x
  3. Step 3: Cross multiply
    135,379.18x = 186,842.82 × 78,007.51
  4. Step 4: Simplify right side
    135,379.18x = 14,575,143,149.58
  5. Step 5: Solve for x
    x = 14,575,143,149.58/135,379.18
  6. Step 6: Final answer
    x = 107,661.63

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1.5x scale

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.