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Finding the Fourth Proportional to 72,617.59, 100,211.88 and 40,786.48

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Solution

The fourth proportional to 72,617.59, 100,211.88 and 40,786.48 is: 56,285.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,617.59 : 100,211.88 = 40,786.48 : x
  2. Step 2: Convert to fraction form
    72,617.59/100,211.88 = 40,786.48/x
  3. Step 3: Cross multiply
    72,617.59x = 100,211.88 × 40,786.48
  4. Step 4: Simplify right side
    72,617.59x = 4,087,289,839.38
  5. Step 5: Solve for x
    x = 4,087,289,839.38/72,617.59
  6. Step 6: Final answer
    x = 56,285.12

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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.