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Finding the Fourth Proportional to 71,704.91, 98,955.18 and 39,440.90

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Solution

The fourth proportional to 71,704.91, 98,955.18 and 39,440.90 is: 54,429.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,704.91 : 98,955.18 = 39,440.90 : x
  2. Step 2: Convert to fraction form
    71,704.91/98,955.18 = 39,440.90/x
  3. Step 3: Cross multiply
    71,704.91x = 98,955.18 × 39,440.90
  4. Step 4: Simplify right side
    71,704.91x = 3,902,880,864.09
  5. Step 5: Solve for x
    x = 3,902,880,864.09/71,704.91
  6. Step 6: Final answer
    x = 54,429.76

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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.