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Finding the Fourth Proportional to 66,274.86, 99,374.64 and 45,240.38

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Solution

The fourth proportional to 66,274.86, 99,374.64 and 45,240.38 is: 67,834.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,274.86 : 99,374.64 = 45,240.38 : x
  2. Step 2: Convert to fraction form
    66,274.86/99,374.64 = 45,240.38/x
  3. Step 3: Cross multiply
    66,274.86x = 99,374.64 × 45,240.38
  4. Step 4: Simplify right side
    66,274.86x = 4,495,745,979.09
  5. Step 5: Solve for x
    x = 4,495,745,979.09/66,274.86
  6. Step 6: Final answer
    x = 67,834.86

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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.