Home / 135,988.09-187,609.82-78,616.86

Finding the Fourth Proportional to 135,988.09, 187,609.82 and 78,616.86

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Solution

The fourth proportional to 135,988.09, 187,609.82 and 78,616.86 is: 108,460.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,988.09 : 187,609.82 = 78,616.86 : x
  2. Step 2: Convert to fraction form
    135,988.09/187,609.82 = 78,616.86/x
  3. Step 3: Cross multiply
    135,988.09x = 187,609.82 × 78,616.86
  4. Step 4: Simplify right side
    135,988.09x = 14,749,294,953.57
  5. Step 5: Solve for x
    x = 14,749,294,953.57/135,988.09
  6. Step 6: Final answer
    x = 108,460.20

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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.