Home / 187,128.70-258,239.42-102,245.75

Finding the Fourth Proportional to 187,128.70, 258,239.42 and 102,245.75

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Solution

The fourth proportional to 187,128.70, 258,239.42 and 102,245.75 is: 141,100.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,128.70 : 258,239.42 = 102,245.75 : x
  2. Step 2: Convert to fraction form
    187,128.70/258,239.42 = 102,245.75/x
  3. Step 3: Cross multiply
    187,128.70x = 258,239.42 × 102,245.75
  4. Step 4: Simplify right side
    187,128.70x = 26,403,883,177.47
  5. Step 5: Solve for x
    x = 26,403,883,177.47/187,128.70
  6. Step 6: Final answer
    x = 141,100.13

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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.