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Finding the Fourth Proportional to 126,516.72, 174,451.80 and 103,474.80

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Solution

The fourth proportional to 126,516.72, 174,451.80 and 103,474.80 is: 142,679.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,516.72 : 174,451.80 = 103,474.80 : x
  2. Step 2: Convert to fraction form
    126,516.72/174,451.80 = 103,474.80/x
  3. Step 3: Cross multiply
    126,516.72x = 174,451.80 × 103,474.80
  4. Step 4: Simplify right side
    126,516.72x = 18,051,365,114.64
  5. Step 5: Solve for x
    x = 18,051,365,114.64/126,516.72
  6. Step 6: Final answer
    x = 142,679.68

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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.