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Finding the Fourth Proportional to 74,418.70, 111,640.35 and 34,477.60

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Solution

The fourth proportional to 74,418.70, 111,640.35 and 34,477.60 is: 51,722.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,418.70 : 111,640.35 = 34,477.60 : x
  2. Step 2: Convert to fraction form
    74,418.70/111,640.35 = 34,477.60/x
  3. Step 3: Cross multiply
    74,418.70x = 111,640.35 × 34,477.60
  4. Step 4: Simplify right side
    74,418.70x = 3,849,091,331.16
  5. Step 5: Solve for x
    x = 3,849,091,331.16/74,418.70
  6. Step 6: Final answer
    x = 51,722.10

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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.