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Finding the Fourth Proportional to 213,425.72, 320,134.92 and 63,666.44

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Solution

The fourth proportional to 213,425.72, 320,134.92 and 63,666.44 is: 95,498.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,425.72 : 320,134.92 = 63,666.44 : x
  2. Step 2: Convert to fraction form
    213,425.72/320,134.92 = 63,666.44/x
  3. Step 3: Cross multiply
    213,425.72x = 320,134.92 × 63,666.44
  4. Step 4: Simplify right side
    213,425.72x = 20,381,849,075.41
  5. Step 5: Solve for x
    x = 20,381,849,075.41/213,425.72
  6. Step 6: Final answer
    x = 95,498.56

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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.