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Finding the Fourth Proportional to 74,080.80, 111,121.20 and 71,893.80

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Solution

The fourth proportional to 74,080.80, 111,121.20 and 71,893.80 is: 107,840.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,080.80 : 111,121.20 = 71,893.80 : x
  2. Step 2: Convert to fraction form
    74,080.80/111,121.20 = 71,893.80/x
  3. Step 3: Cross multiply
    74,080.80x = 111,121.20 × 71,893.80
  4. Step 4: Simplify right side
    74,080.80x = 7,988,925,328.56
  5. Step 5: Solve for x
    x = 7,988,925,328.56/74,080.80
  6. Step 6: Final answer
    x = 107,840.70

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1.5x scale

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.