Home / 258,085.44-387,128.16-80,585.28

Finding the Fourth Proportional to 258,085.44, 387,128.16 and 80,585.28

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Solution

The fourth proportional to 258,085.44, 387,128.16 and 80,585.28 is: 120,877.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,085.44 : 387,128.16 = 80,585.28 : x
  2. Step 2: Convert to fraction form
    258,085.44/387,128.16 = 80,585.28/x
  3. Step 3: Cross multiply
    258,085.44x = 387,128.16 × 80,585.28
  4. Step 4: Simplify right side
    258,085.44x = 31,196,831,169.48
  5. Step 5: Solve for x
    x = 31,196,831,169.48/258,085.44
  6. Step 6: Final answer
    x = 120,877.92

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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.