Home / 258,150.74-387,265.41-131,721.89

Finding the Fourth Proportional to 258,150.74, 387,265.41 and 131,721.89

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Solution

The fourth proportional to 258,150.74, 387,265.41 and 131,721.89 is: 197,602.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,150.74 : 387,265.41 = 131,721.89 : x
  2. Step 2: Convert to fraction form
    258,150.74/387,265.41 = 131,721.89/x
  3. Step 3: Cross multiply
    258,150.74x = 387,265.41 × 131,721.89
  4. Step 4: Simplify right side
    258,150.74x = 51,011,329,800.50
  5. Step 5: Solve for x
    x = 51,011,329,800.50/258,150.74
  6. Step 6: Final answer
    x = 197,602.88

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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.