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Finding the Fourth Proportional to 72,984, 100,718.04 and 39,450

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Solution

The fourth proportional to 72,984, 100,718.04 and 39,450 is: 54,441.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,984 : 100,718.04 = 39,450 : x
  2. Step 2: Convert to fraction form
    72,984/100,718.04 = 39,450/x
  3. Step 3: Cross multiply
    72,984x = 100,718.04 × 39,450
  4. Step 4: Simplify right side
    72,984x = 3,973,326,678.00
  5. Step 5: Solve for x
    x = 3,973,326,678.00/72,984
  6. Step 6: Final answer
    x = 54,441.06

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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.