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Finding the Fourth Proportional to 70,708.65, 97,563.91 and 39,664.87

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Solution

The fourth proportional to 70,708.65, 97,563.91 and 39,664.87 is: 54,729.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,708.65 : 97,563.91 = 39,664.87 : x
  2. Step 2: Convert to fraction form
    70,708.65/97,563.91 = 39,664.87/x
  3. Step 3: Cross multiply
    70,708.65x = 97,563.91 × 39,664.87
  4. Step 4: Simplify right side
    70,708.65x = 3,869,859,806.84
  5. Step 5: Solve for x
    x = 3,869,859,806.84/70,708.65
  6. Step 6: Final answer
    x = 54,729.65

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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.