Home / 131,138.19-180,999.32-83,382.21

Finding the Fourth Proportional to 131,138.19, 180,999.32 and 83,382.21

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Solution

The fourth proportional to 131,138.19, 180,999.32 and 83,382.21 is: 115,085.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,138.19 : 180,999.32 = 83,382.21 : x
  2. Step 2: Convert to fraction form
    131,138.19/180,999.32 = 83,382.21/x
  3. Step 3: Cross multiply
    131,138.19x = 180,999.32 × 83,382.21
  4. Step 4: Simplify right side
    131,138.19x = 15,092,122,893.19
  5. Step 5: Solve for x
    x = 15,092,122,893.19/131,138.19
  6. Step 6: Final answer
    x = 115,085.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.