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Finding the Fourth Proportional to 74,976.80, 112,409.78 and 35,487.68

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Solution

The fourth proportional to 74,976.80, 112,409.78 and 35,487.68 is: 53,205.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,976.80 : 112,409.78 = 35,487.68 : x
  2. Step 2: Convert to fraction form
    74,976.80/112,409.78 = 35,487.68/x
  3. Step 3: Cross multiply
    74,976.80x = 112,409.78 × 35,487.68
  4. Step 4: Simplify right side
    74,976.80x = 3,989,161,562.02
  5. Step 5: Solve for x
    x = 3,989,161,562.02/74,976.80
  6. Step 6: Final answer
    x = 53,205.28

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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.