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Finding the Fourth Proportional to 129,057.70, 193,709.69 and 79,235.11

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Solution

The fourth proportional to 129,057.70, 193,709.69 and 79,235.11 is: 118,928.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,057.70 : 193,709.69 = 79,235.11 : x
  2. Step 2: Convert to fraction form
    129,057.70/193,709.69 = 79,235.11/x
  3. Step 3: Cross multiply
    129,057.70x = 193,709.69 × 79,235.11
  4. Step 4: Simplify right side
    129,057.70x = 15,348,607,714.77
  5. Step 5: Solve for x
    x = 15,348,607,714.77/129,057.70
  6. Step 6: Final answer
    x = 118,928.26

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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.