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Finding the Fourth Proportional to 74,556.80, 111,640.80 and 48,118.40

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Solution

The fourth proportional to 74,556.80, 111,640.80 and 48,118.40 is: 72,052.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,556.80 : 111,640.80 = 48,118.40 : x
  2. Step 2: Convert to fraction form
    74,556.80/111,640.80 = 48,118.40/x
  3. Step 3: Cross multiply
    74,556.80x = 111,640.80 × 48,118.40
  4. Step 4: Simplify right side
    74,556.80x = 5,371,976,670.72
  5. Step 5: Solve for x
    x = 5,371,976,670.72/74,556.80
  6. Step 6: Final answer
    x = 72,052.14

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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.