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Finding the Fourth Proportional to 72,491.88, 100,039.50 and 40,227.24

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Solution

The fourth proportional to 72,491.88, 100,039.50 and 40,227.24 is: 55,513.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,491.88 : 100,039.50 = 40,227.24 : x
  2. Step 2: Convert to fraction form
    72,491.88/100,039.50 = 40,227.24/x
  3. Step 3: Cross multiply
    72,491.88x = 100,039.50 × 40,227.24
  4. Step 4: Simplify right side
    72,491.88x = 4,024,312,975.98
  5. Step 5: Solve for x
    x = 4,024,312,975.98/72,491.88
  6. Step 6: Final answer
    x = 55,513.98

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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.