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Finding the Fourth Proportional to 129,137.16, 178,128.84 and 88,780.86

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Solution

The fourth proportional to 129,137.16, 178,128.84 and 88,780.86 is: 122,462.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,137.16 : 178,128.84 = 88,780.86 : x
  2. Step 2: Convert to fraction form
    129,137.16/178,128.84 = 88,780.86/x
  3. Step 3: Cross multiply
    129,137.16x = 178,128.84 × 88,780.86
  4. Step 4: Simplify right side
    129,137.16x = 15,814,431,606.00
  5. Step 5: Solve for x
    x = 15,814,431,606.00/129,137.16
  6. Step 6: Final answer
    x = 122,462.28

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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.