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Finding the Fourth Proportional to 213,080.80, 319,621.20 and 119,574.40

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Solution

The fourth proportional to 213,080.80, 319,621.20 and 119,574.40 is: 179,361.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,080.80 : 319,621.20 = 119,574.40 : x
  2. Step 2: Convert to fraction form
    213,080.80/319,621.20 = 119,574.40/x
  3. Step 3: Cross multiply
    213,080.80x = 319,621.20 × 119,574.40
  4. Step 4: Simplify right side
    213,080.80x = 38,218,513,217.28
  5. Step 5: Solve for x
    x = 38,218,513,217.28/213,080.80
  6. Step 6: Final answer
    x = 179,361.60

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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.