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Finding the Fourth Proportional to 66,315.68, 99,491.73 and 19,568.55

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Solution

The fourth proportional to 66,315.68, 99,491.73 and 19,568.55 is: 29,358.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,315.68 : 99,491.73 = 19,568.55 : x
  2. Step 2: Convert to fraction form
    66,315.68/99,491.73 = 19,568.55/x
  3. Step 3: Cross multiply
    66,315.68x = 99,491.73 × 19,568.55
  4. Step 4: Simplify right side
    66,315.68x = 1,946,908,893.09
  5. Step 5: Solve for x
    x = 1,946,908,893.09/66,315.68
  6. Step 6: Final answer
    x = 29,358.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.