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Finding the Fourth Proportional to 252,080.80, 378,121.20 and 140,106.40

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Solution

The fourth proportional to 252,080.80, 378,121.20 and 140,106.40 is: 210,159.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,080.80 : 378,121.20 = 140,106.40 : x
  2. Step 2: Convert to fraction form
    252,080.80/378,121.20 = 140,106.40/x
  3. Step 3: Cross multiply
    252,080.80x = 378,121.20 × 140,106.40
  4. Step 4: Simplify right side
    252,080.80x = 52,977,200,095.68
  5. Step 5: Solve for x
    x = 52,977,200,095.68/252,080.80
  6. Step 6: Final answer
    x = 210,159.60

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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.