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Finding the Fourth Proportional to 187,391.70, 258,614.59 and 106,821.14

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Solution

The fourth proportional to 187,391.70, 258,614.59 and 106,821.14 is: 147,421.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,391.70 : 258,614.59 = 106,821.14 : x
  2. Step 2: Convert to fraction form
    187,391.70/258,614.59 = 106,821.14/x
  3. Step 3: Cross multiply
    187,391.70x = 258,614.59 × 106,821.14
  4. Step 4: Simplify right side
    187,391.70x = 27,625,505,324.43
  5. Step 5: Solve for x
    x = 27,625,505,324.43/187,391.70
  6. Step 6: Final answer
    x = 147,421.18

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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.