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Finding the Fourth Proportional to 129,053.88, 178,159.11 and 80,682.68

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Solution

The fourth proportional to 129,053.88, 178,159.11 and 80,682.68 is: 111,382.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,053.88 : 178,159.11 = 80,682.68 : x
  2. Step 2: Convert to fraction form
    129,053.88/178,159.11 = 80,682.68/x
  3. Step 3: Cross multiply
    129,053.88x = 178,159.11 × 80,682.68
  4. Step 4: Simplify right side
    129,053.88x = 14,374,354,461.21
  5. Step 5: Solve for x
    x = 14,374,354,461.21/129,053.88
  6. Step 6: Final answer
    x = 111,382.58

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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.