Home / 258,748.90-388,139.82-81,262.92

Finding the Fourth Proportional to 258,748.90, 388,139.82 and 81,262.92

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Solution

The fourth proportional to 258,748.90, 388,139.82 and 81,262.92 is: 121,899.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,748.90 : 388,139.82 = 81,262.92 : x
  2. Step 2: Convert to fraction form
    258,748.90/388,139.82 = 81,262.92/x
  3. Step 3: Cross multiply
    258,748.90x = 388,139.82 × 81,262.92
  4. Step 4: Simplify right side
    258,748.90x = 31,541,375,141.47
  5. Step 5: Solve for x
    x = 31,541,375,141.47/258,748.90
  6. Step 6: Final answer
    x = 121,899.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.