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Finding the Fourth Proportional to 74,445.87, 102,735.72 and 40,454.64

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Solution

The fourth proportional to 74,445.87, 102,735.72 and 40,454.64 is: 55,827.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,445.87 : 102,735.72 = 40,454.64 : x
  2. Step 2: Convert to fraction form
    74,445.87/102,735.72 = 40,454.64/x
  3. Step 3: Cross multiply
    74,445.87x = 102,735.72 × 40,454.64
  4. Step 4: Simplify right side
    74,445.87x = 4,156,136,567.74
  5. Step 5: Solve for x
    x = 4,156,136,567.74/74,445.87
  6. Step 6: Final answer
    x = 55,827.63

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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.