Home / 129,512.40-178,741.32-81,763.28

Finding the Fourth Proportional to 129,512.40, 178,741.32 and 81,763.28

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Solution

The fourth proportional to 129,512.40, 178,741.32 and 81,763.28 is: 112,842.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,512.40 : 178,741.32 = 81,763.28 : x
  2. Step 2: Convert to fraction form
    129,512.40/178,741.32 = 81,763.28/x
  3. Step 3: Cross multiply
    129,512.40x = 178,741.32 × 81,763.28
  4. Step 4: Simplify right side
    129,512.40x = 14,614,476,594.73
  5. Step 5: Solve for x
    x = 14,614,476,594.73/129,512.40
  6. Step 6: Final answer
    x = 112,842.30

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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.