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Finding the Fourth Proportional to 72,984.71, 100,718.88 and 39,450.71

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Solution

The fourth proportional to 72,984.71, 100,718.88 and 39,450.71 is: 54,441.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,984.71 : 100,718.88 = 39,450.71 : x
  2. Step 2: Convert to fraction form
    72,984.71/100,718.88 = 39,450.71/x
  3. Step 3: Cross multiply
    72,984.71x = 100,718.88 × 39,450.71
  4. Step 4: Simplify right side
    72,984.71x = 3,973,431,326.40
  5. Step 5: Solve for x
    x = 3,973,431,326.40/72,984.71
  6. Step 6: Final answer
    x = 54,441.97

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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.