Home / 136,218.85-187,979.08-78,860.60

Finding the Fourth Proportional to 136,218.85, 187,979.08 and 78,860.60

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Solution

The fourth proportional to 136,218.85, 187,979.08 and 78,860.60 is: 108,825.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,218.85 : 187,979.08 = 78,860.60 : x
  2. Step 2: Convert to fraction form
    136,218.85/187,979.08 = 78,860.60/x
  3. Step 3: Cross multiply
    136,218.85x = 187,979.08 × 78,860.60
  4. Step 4: Simplify right side
    136,218.85x = 14,824,143,502.47
  5. Step 5: Solve for x
    x = 14,824,143,502.47/136,218.85
  6. Step 6: Final answer
    x = 108,825.93

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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.