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Finding the Fourth Proportional to 213,080.40, 319,537.47 and 79,887.96

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Solution

The fourth proportional to 213,080.40, 319,537.47 and 79,887.96 is: 119,800.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,080.40 : 319,537.47 = 79,887.96 : x
  2. Step 2: Convert to fraction form
    213,080.40/319,537.47 = 79,887.96/x
  3. Step 3: Cross multiply
    213,080.40x = 319,537.47 × 79,887.96
  4. Step 4: Simplify right side
    213,080.40x = 25,527,196,621.86
  5. Step 5: Solve for x
    x = 25,527,196,621.86/213,080.40
  6. Step 6: Final answer
    x = 119,800.77

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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.