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Finding the Fourth Proportional to 208,382.28, 312,619.56 and 66,271.02

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Solution

The fourth proportional to 208,382.28, 312,619.56 and 66,271.02 is: 99,421.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,382.28 : 312,619.56 = 66,271.02 : x
  2. Step 2: Convert to fraction form
    208,382.28/312,619.56 = 66,271.02/x
  3. Step 3: Cross multiply
    208,382.28x = 312,619.56 × 66,271.02
  4. Step 4: Simplify right side
    208,382.28x = 20,717,618,516.43
  5. Step 5: Solve for x
    x = 20,717,618,516.43/208,382.28
  6. Step 6: Final answer
    x = 99,421.21

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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.