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Finding the Fourth Proportional to 213,425.55, 320,143.79 and 101,079.36

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Solution

The fourth proportional to 213,425.55, 320,143.79 and 101,079.36 is: 151,621.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,425.55 : 320,143.79 = 101,079.36 : x
  2. Step 2: Convert to fraction form
    213,425.55/320,143.79 = 101,079.36/x
  3. Step 3: Cross multiply
    213,425.55x = 320,143.79 × 101,079.36
  4. Step 4: Simplify right side
    213,425.55x = 32,359,929,653.87
  5. Step 5: Solve for x
    x = 32,359,929,653.87/213,425.55
  6. Step 6: Final answer
    x = 151,621.63

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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.