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Finding the Fourth Proportional to 72,740.98, 100,388.19 and 40,912.84

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Solution

The fourth proportional to 72,740.98, 100,388.19 and 40,912.84 is: 56,462.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,740.98 : 100,388.19 = 40,912.84 : x
  2. Step 2: Convert to fraction form
    72,740.98/100,388.19 = 40,912.84/x
  3. Step 3: Cross multiply
    72,740.98x = 100,388.19 × 40,912.84
  4. Step 4: Simplify right side
    72,740.98x = 4,107,165,955.36
  5. Step 5: Solve for x
    x = 4,107,165,955.36/72,740.98
  6. Step 6: Final answer
    x = 56,462.89

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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.