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Finding the Fourth Proportional to 129,558.98, 193,899.53 and 79,670.68

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Solution

The fourth proportional to 129,558.98, 193,899.53 and 79,670.68 is: 119,236.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,558.98 : 193,899.53 = 79,670.68 : x
  2. Step 2: Convert to fraction form
    129,558.98/193,899.53 = 79,670.68/x
  3. Step 3: Cross multiply
    129,558.98x = 193,899.53 × 79,670.68
  4. Step 4: Simplify right side
    129,558.98x = 15,448,107,406.78
  5. Step 5: Solve for x
    x = 15,448,107,406.78/129,558.98
  6. Step 6: Final answer
    x = 119,236.10

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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.