Home / 258,627.10-387,941.10-81,147.73

Finding the Fourth Proportional to 258,627.10, 387,941.10 and 81,147.73

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Solution

The fourth proportional to 258,627.10, 387,941.10 and 81,147.73 is: 121,721.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,627.10 : 387,941.10 = 81,147.73 : x
  2. Step 2: Convert to fraction form
    258,627.10/387,941.10 = 81,147.73/x
  3. Step 3: Cross multiply
    258,627.10x = 387,941.10 × 81,147.73
  4. Step 4: Simplify right side
    258,627.10x = 31,480,539,638.70
  5. Step 5: Solve for x
    x = 31,480,539,638.70/258,627.10
  6. Step 6: Final answer
    x = 121,721.74

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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.