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Finding the Fourth Proportional to 213,064.04, 319,513.01 and 79,871.63

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Solution

The fourth proportional to 213,064.04, 319,513.01 and 79,871.63 is: 119,776.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,064.04 : 319,513.01 = 79,871.63 : x
  2. Step 2: Convert to fraction form
    213,064.04/319,513.01 = 79,871.63/x
  3. Step 3: Cross multiply
    213,064.04x = 319,513.01 × 79,871.63
  4. Step 4: Simplify right side
    213,064.04x = 25,520,022,917.98
  5. Step 5: Solve for x
    x = 25,520,022,917.98/213,064.04
  6. Step 6: Final answer
    x = 119,776.30

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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.