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Finding the Fourth Proportional to 66,425.30, 99,568.74 and 28,975.31

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Solution

The fourth proportional to 66,425.30, 99,568.74 and 28,975.31 is: 43,432.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,425.30 : 99,568.74 = 28,975.31 : x
  2. Step 2: Convert to fraction form
    66,425.30/99,568.74 = 28,975.31/x
  3. Step 3: Cross multiply
    66,425.30x = 99,568.74 × 28,975.31
  4. Step 4: Simplify right side
    66,425.30x = 2,885,035,107.81
  5. Step 5: Solve for x
    x = 2,885,035,107.81/66,425.30
  6. Step 6: Final answer
    x = 43,432.77

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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.