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Finding the Fourth Proportional to 74,812, 103,242.72 and 41,280.16

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Solution

The fourth proportional to 74,812, 103,242.72 and 41,280.16 is: 56,967.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,812 : 103,242.72 = 41,280.16 : x
  2. Step 2: Convert to fraction form
    74,812/103,242.72 = 41,280.16/x
  3. Step 3: Cross multiply
    74,812x = 103,242.72 × 41,280.16
  4. Step 4: Simplify right side
    74,812x = 4,261,876,000.44
  5. Step 5: Solve for x
    x = 4,261,876,000.44/74,812
  6. Step 6: Final answer
    x = 56,967.81

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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.