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Finding the Fourth Proportional to 73,142.50, 100,938.90 and 40,879.66

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Solution

The fourth proportional to 73,142.50, 100,938.90 and 40,879.66 is: 56,415.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,142.50 : 100,938.90 = 40,879.66 : x
  2. Step 2: Convert to fraction form
    73,142.50/100,938.90 = 40,879.66/x
  3. Step 3: Cross multiply
    73,142.50x = 100,938.90 × 40,879.66
  4. Step 4: Simplify right side
    73,142.50x = 4,126,347,912.77
  5. Step 5: Solve for x
    x = 4,126,347,912.77/73,142.50
  6. Step 6: Final answer
    x = 56,415.19

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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.