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Finding the Fourth Proportional to 213,186.80, 319,693.80 and 72,873.20

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Solution

The fourth proportional to 213,186.80, 319,693.80 and 72,873.20 is: 109,280.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,186.80 : 319,693.80 = 72,873.20 : x
  2. Step 2: Convert to fraction form
    213,186.80/319,693.80 = 72,873.20/x
  3. Step 3: Cross multiply
    213,186.80x = 319,693.80 × 72,873.20
  4. Step 4: Simplify right side
    213,186.80x = 23,297,110,226.16
  5. Step 5: Solve for x
    x = 23,297,110,226.16/213,186.80
  6. Step 6: Final answer
    x = 109,280.27

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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.