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Finding the Fourth Proportional to 74,874.01, 103,435.44 and 64,784.94

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Solution

The fourth proportional to 74,874.01, 103,435.44 and 64,784.94 is: 89,497.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,874.01 : 103,435.44 = 64,784.94 : x
  2. Step 2: Convert to fraction form
    74,874.01/103,435.44 = 64,784.94/x
  3. Step 3: Cross multiply
    74,874.01x = 103,435.44 × 64,784.94
  4. Step 4: Simplify right side
    74,874.01x = 6,701,058,774.27
  5. Step 5: Solve for x
    x = 6,701,058,774.27/74,874.01
  6. Step 6: Final answer
    x = 89,497.79

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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.