Home / 258,430.09-387,644.91-80,950.94

Finding the Fourth Proportional to 258,430.09, 387,644.91 and 80,950.94

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Solution

The fourth proportional to 258,430.09, 387,644.91 and 80,950.94 is: 121,426.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,430.09 : 387,644.91 = 80,950.94 : x
  2. Step 2: Convert to fraction form
    258,430.09/387,644.91 = 80,950.94/x
  3. Step 3: Cross multiply
    258,430.09x = 387,644.91 × 80,950.94
  4. Step 4: Simplify right side
    258,430.09x = 31,380,219,445.96
  5. Step 5: Solve for x
    x = 31,380,219,445.96/258,430.09
  6. Step 6: Final answer
    x = 121,426.34

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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.