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Finding the Fourth Proportional to 81,967.20, 122,950.80 and 73,672.80

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Solution

The fourth proportional to 81,967.20, 122,950.80 and 73,672.80 is: 110,509.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,967.20 : 122,950.80 = 73,672.80 : x
  2. Step 2: Convert to fraction form
    81,967.20/122,950.80 = 73,672.80/x
  3. Step 3: Cross multiply
    81,967.20x = 122,950.80 × 73,672.80
  4. Step 4: Simplify right side
    81,967.20x = 9,058,129,698.24
  5. Step 5: Solve for x
    x = 9,058,129,698.24/81,967.20
  6. Step 6: Final answer
    x = 110,509.20

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1.5x scale

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.